charant Sophocles Antigone Essays: The Character of Antigone :: Antigone essays

Antigone  Ã‚     In the story of Antigone, two very headstrong people's beliefs are matched up against each other. Creon, the king, made it law that no traitor to the Kingdom shall have a proper burial, instead they will be left laying on the ground to rot and to be eaten by the animals. This was the case of Antigone's brother, Polyneices. Antigone's love for her brother was so great that she went against the law, even though she knew Creon's punishment for breaking the law was public stoning, which ultimately resulted in death. Creon, who had an equal amount of determination, refused to back down from his law for his own reasons even after Antigone ignored it. He could not submit himself to the will of a woman. At that time, women were looked at as being in the same class as slaves. If he did, it would have showed weakness in him and the people would have overthrown him for letting a woman have that effect on him. So instead of the public stoning, Creon sentenced Antigone to die in a cave where she could starve to death. Instead of dying a slow miserable death, she committed suicide by hanging herself. As it turns out, this set off a string of events for the king that he could have never saw coming. The first of the tragic events that would unfold was the death of h is son. Haemon was Creon and Eurydice's son and was next in line to the throne with Antigone as his wife. Creon's son was set to be married to Antigone, but after Creon sentenced her to death, Haemon turned on his father. He was outraged that Creon had taken away his future wife, in which he was very much in love with. He was so outraged, that he would even break the unique and special bond between father and son. Haemon felt incomplete without Antigone and could not stand being apart from her. He found away to solve his problem and get revenge on his father at the same time. He had taken his own life and at the same time killed the future of the family's place in the throne. Creon was crushed at what his son did, especially hearing it from someone else. After hearing of Haemon's death, Eurydice was completely devastated and felt somewhat violated. She felt Creon was responsible for the death of not only Haemon, but for Megareus who was killed some years before.

Hollywood’s distortion of truth Essay

When it comes to film’s interpretation of history and reality, such as the recent film’s â€Å"Argo† and â€Å"Zero Dark Thirty†, Hollywood has long had a habit of altering facts, creating illusions and fabrications, and even distorting final outcomes. Hollywood is an industry, and for a long time now, has understandably aimed at creating the best possible plot line with regard to its films. In some ways, it could be considered a â€Å"dream factory,† with regard to how removed from reality many of the Hollywood plot lines are. After all, Hollywood film makers are motivated by an economic imperative and as such their bottom line is profit, and aim to satisfy their target audience as greatly as possible. However, in too many films supposedly based on fact, reality and truth has been sacrificed all together, in the pursuit of pure, generic entertainment. The phrase, â€Å"don’t let truth get in the way of a good story† is worryingly, far too applicable to modern Hollywood. With regard to films that claim to be based on a TRUE story, there is a line that should be drawn when Hollywood creates its version of history. To put it simply, how untrue, is just true enough? It seems at present, the answer is somewhat flexible. On February 23rd this year, â€Å"Argo† a significantly dramatized, exaggerated and almost ahistorical interpretation of true story, took out the Academy award for â€Å"Best Picture†, the most prestigious of the Oscars. â€Å"Argo†, directed, produced by and starring Ben Affleck, portrays six helpless, and importantly, innocent Americans thrilling escape, notably orchestrated by the CIA, from the hostile and draconian revolutionary Iran, which is depicted to have been overrun by hoards of bearded savages. The story concludes with celebration, surrounding American, heroism, courage and innovation, leaving the Iranians with frustration in their defeat. Now this approach to film making is not unusual, take James Cameron’s â€Å"Avatar†, the highest grossing film of all time. â€Å"Avatar†, unlike â€Å"Argo†, does not imply that it represents history, and reality, and in this respect tells a fantastic story without misleading the audience. Hollywood blockbusters have always traditionally depicted one party as glorious and triumphant, and the other defeated. â€Å"Avatar†, depicts the peaceful, nomadic tribes of the planet Pandora and their experiences with Humans, who have recently landed on Pandora. The audience is positioned to sympathise with the tribes, before the natives are subject to ruthless invasion and onslaught by the armies of ‘future earth’, and with an enormous struggle, eventually emerge victorious over the violent and materialistic invaders. However, this is fantasy, and illusion, in resplendent, eye popping 3D. â€Å"Argo† on the other hand, and other films such as zero dark thirty, take dramatization and illusion a step further, by distorting the truth of the stories intended to be â€Å"based† on history. In this respect, Hollywood alters reality and history for the audience, and leads them to believe fabricated tales and false facts. Argo’s portrayal of the American civilian escape from Iran as danger ridden, with capture and horror always just around the corner was a plot construction by Hollywood. One of the diplomats involved in the actual escape said of it; â€Å"Noone ever asked, the truth is the immigration officers barely looked at us and we were processed out the regular way†¦It was that straight forward†. The Hollywood interpretation of the true story was so far removed from reality that it prompted Ken Taylor, a Canadian Diplomat to say; â€Å"the amusing side is the script writer in Hollywood, had no idea what he was talking about†. According to Ben Affleck, â€Å"It’s okay to embellish, it’s okay to compress, as long as you don’t fundamentally change the nature of the story and what happened†. Yes, to a small extent it is. However, the reality in â€Å"Argo† was drastically manipulated. It portrayed the Iranian’s as immoral, ignored their docile side and failed to depict the fact that they too had a cause, and wanted justice. It made out as though it was almost entirely the American’s who had skilfully crafted and executed the escape plan, but in reality, according to Jimmy Carter, it was more than 90% a Canadian effort. The transformation of the truth and history, into â€Å"Argo†, somewhat resembled that of Griffin Mill’s ‘winning’ marketing elements for films in â€Å"The Player†, a satirical film on Hollywood, directed by Robert Altman. Mill talks of the factors in film needed to market it successfully; â€Å"Suspense, laughter, violence. Hope, heart, nudity, sex. Happy endings. Mainly happy endings. † His statement is then followed by the question asked by June; â€Å"What about reality? †. Hollywood applies Mill’s theory of â€Å"up, everything up†, too satisfy the profit motive by which Hollywood works, and in many cases glorify the American culture; as seen in the fictional conclusion of â€Å"Argo†. It should be acknowledged that this approach to interpretations of history by writers and directors is not new, and was evident in Shakespeare’s late 16th century in which he slanders Richard the 3rd in support of Tudor dynasty. When Hollywood advertises its intention to base a film around history and reality, its ahistorical interpretations of the truth should be curbed, as it is through story telling that we learn about ourselves, and our cultures as the human race. Recent research has shown that film, far more than previously thought is an incredibly powerful tool for teaching ; children in particular. When films distort the truth, and include incorrect facts, the audience too interprets history, and the reality falsely, even the falsity is outlined pre and post screening of the film. In this respect, when claiming to represent truth, Hollywood should defeat the powerful temptation to apply to the film many of Griffin Mill’s ‘successful marketing elements’, and rather than fabricate to produce pure entertainment, represent truth so that society may understand history, truth, and reality.

Essay - 1538 Words

Exapmles of actions and decisions based on man’s wisdom and god’s wisdom was when they encountered the goathearded and decided to let them go. Even though they knew of the risk that if they let them go, they might inform the tailaban or mignt get tortured by the taiban to revela anyhthng they still let them go. This celary shos they wiesom and how they are under gods rule. It isn’t easy to leave your life up to luck. That what they exactly did they would rather free the goatheards than themselves. It shows hos gods wisom is in them. Shortly after large numbe of tailaban troops came down to the mountains They fight back, killing many Taliban soldiers, but they’re so badly outnumbered that they have no choice but to retreat, jumping down the†¦show more content†¦The good that took place in this book was when Lutterle’s leg is badly wouned and he craws up the side of mountain and sees three men pointing huns at him. They were Pashtuns-an ethn ic group that lives primalry in afghanista nad pakistand. They have this ancient custom,†lokhay†, that requeirs them to take care of people in need even if ti means risking their own lives. The leader of the three men a doctor named Sarawa, had luttrell carried back to his village Sabray, and treats his wounds. Luttrell is terried but he relaixes he had no choice and accepts the firend. Like that part of the book was the only good I have heard so far. Them taking an amiercan and not only an ameircan but a soldier was just shocking. Especially just because of their acntient tradition. The act of common graced also takes plaxe here. The doctrine of common grace pertains to the soverign graxce of God bestowed upon all of mankind regardless of their election. In other woeds god has always bstowed his graciousness on all people in all parts of the eath. What the Pashtuns did was possible by gods grachiousness that he had put in his people. As ti says in common grace that gods restaining of evil the navy seals had that when they let go of the goatherds. He gave them the wisdom not to commit sin. The sin that the goatherds had commited telling on the navy seals had resulted the chaosShow MoreRelatedWhat Is an Essay?1440 Words   |  6 PagesBuscemi Essay #3 Rough Draft An essay is a creative written piece in which the author uses different styles such as diction, tone, pathos, ethos or logos to communicate a message to the reader using either a personal experience, filled with morals and parables, or a informative text filled with educational terms. Educational terms could mean the usage of complicated and elevated words or simply information you would get in schools. Some authors, such as Cynthia Ozick, claim that an essay has noRead Morenarrative essay1321 Words   |  6 PagesNarrative Essay A Brief Guide to Writing Narrative Essays Narrative writing tells a story. In essays the narrative writing could also be considered reflection or an exploration of the author s values told as a story. The author may remember his or her past, or a memorable person or event from that past, or even observe the present. When you re writing a narrative essay, loosen up. After all, you re basically just telling a story to someone, something you probably do every day in casual conversationRead MoreApplication Essay : A Process Essay770 Words   |  4 Pagesassign an essay. The entire class lets out a groan that could be heard from miles away, however this doesn’t phase your professor. The essay is assigned: a process essay. Now what? What is a process essay? How do you go about writing one? How do you get the A you so desperately need? This paper will discuss everything one needs to know in order to write the perfect process essay such as the definition of a process essay, how to construct it, and how to use proper transitions to make the essay flow. Read MoreEssay763 Words   |  4 PagesCan’t be Built on Soccer Fever† and â€Å"Na Na Na Na, Hey Hey, Goodbye† In Jonathan Zimmerman’s essay â€Å"African National Identities Can’t Be Built on Soccer Fever† he describes how soccer brings the people of Africa together. He talks about the unity of Africans and how much soccer is a part of their lives. He also describes the underlying reason of why soccer is so heavily pushed. The perspective in the essay â€Å"Na Na Na Na, Hey Hey, Goodbye† Tim Bowling discusses his passion for hockey and his hate forRead MoreThe Colonel Essay1320 Words   |  6 PagesIn the essay, The Colonel, Michael Hogan illustrates the importance of the influential sport of tennis. Hogan writes about how tennis changed his life from an early age. When he was younger he saw tennis as a rich mans sport in which he had no interest. One of his much-respected neighbors, the colonel, approached Hogan’s father with the idea that his son might like to learn how to play tennis. After pondering the thought with his father, Hogan decided to take t he offer. The Colonel became his mentorRead MorePersuasive Essays : Persuasive Essay897 Words   |  4 Pagesbegan this class, I loved to write persuasive essays. I loved to write about my own opinions and I was quite good at convincing people to agree with my stand points. To convince others to agree on my point of view was an extraordinary feeling. I am very good at getting my point across and giving my reasons on why I feel the way I do about a certain situation. I loved writing persuasive essays because I love to read them as well. I love how persuasive essays have a call-to-action; giving the readers aRead MoreEnglish Composition One: To Be an Essay or Not to Be an Essay That Is the Question910 Words   |  4 Pages In the past, the mention to have to write a paper for an assignment caused me to break out in a sweat or my mouth instantly dries, well it does not have that kind of effect on me anymore. The key to successfully completing the essay on time is getting to researc h the topic at hand as soon as possible or before the process of writing begins. The next step for me would be to find the argument and take a side. Moreover, picking a thesis statement through brainstorming the information I gathered forRead More Flight Essay834 Words   |  4 Pages Essay on quot;Flightquot; amp;#9;It is always hard to get separated from someone you love and with whom you have shared every moment of his life until he decides to walk on a different path than yours. You dont know how to react and confusion dominates your mind. Should you be angry at him for leaving you, or should you support and respect his decision ? In her essay quot;Flight,quot; Doris Lessing illustrates the story of an old man who is learning to let go his granddaughter as she growsRead MoreEssay and Academic Life1117 Words   |  5 Pageslanguage learner? Discuss two or three problems with specific examples and details. Ex. 9 Analyzing students’ essays. Use the assignment and the Student Essays to answer the following questions. Assignment: Computers have become an important part of educational process. Write convincing illustration to this statement. Use specific and convincing examples and details. Student Essay 1 Computer as a multipurpose universal instrument of education. In our days computers have become an importantRead More Community Essay843 Words   |  4 Pagesan important effect on the shaping of a person’s character is key in both Pythia Peay’s essay, â€Å"Soul Searching† and Winona LaDuke’s interview transcribed in essay form entitled, â€Å"Reclaiming Culture and the Land: Motherhood and the Politics of Sustaining Community†. The two authors present ideas, similar and different, of what it means to live in and be a part of community. Through examining these two essays, summarizing and synthesizing, we can gain a better understanding of what community is and

Which Instructional Design Model That I Will Use Multiple...

Which Instructional Design Model The design model that I will use is multiple intelligences. The major goal of this theory is to foster understanding in ways that takes advantage of the different learners’ intelligences. All learners do not learn information the same way, and instructors need to understand that they must be diverse in their teaching to ensure that learners are able to be engaged with topics that they are teaching. Assumptions about Multiple Intelligences With multiple intelligence, students come to school with different educational needs. Not all students learn the same way so as an educator, one needs to be able to teach multiple ways on a single topic to ensure that all students have been engaged. There are multiple ways to teach a single topic, however, Gardner focused on three approaches: 1. Entry points 2. Telling Analogies 3. Approaching the core (Reigeluth, 2013). Entry points To engage students in understating a topic, there are 6 entry points to consider in multiple intelligences (Reigeluth, 2013). Not all learners are the same and as an instructor is good to individualize your lessons to tap into students in different ways because not all learn the same way. The following are the entry points that Howard Gardner states, however, he states that the model that he uses is not to be considered as a learning style (Reigeluth, 2013). †¢ Narratives is an entry point used for students who enjoy hearing topics discuss through theShow MoreRelatedLiterature Review : Multiple Intelligence Theory2723 Words   |  11 PagesLiterature Review: Multiple Intelligence Theory Leigh Anne Brackett Liberty University Abstract This paper is a literature review relating to the Multiple Intelligence Theory by Howard Gardner. In general, the literature seems to indicate that the Multiple Intelligence Theory is very effective in teaching students. The purpose of this research is to define multiple intelligences, what the strengths are of each intelligence category, and why it is important to use this approach in theRead MoreLearning Styles Literary Review1726 Words   |  7 Pagesfactors that serve as relatively stable indicators of how a learner perceives, interacts with, and responds to the learning environment., or more succinctly, Stewart and Felicetti (1992) define learning styles as those educational conditions under which a student is most likely to learn., as quoted in Clark (2004). The concept of learning styles is well publicised, but there is little agreement on how they should be measured. Coffield, et. al. (2004) argue that much more significance should beRead MoreInstructional Technology As A Problem Solving Tool For Students Of All Ages And Learning Styles3026 Words   |  13 PagesIt becomes an issue of how to train teachers to use instructional technology and truly integrate it into curriculum. It becomes an issue of how to make technology a problem-solving tool for students of all ages and learning styles. Some researchers believe blended learning to be the golden goose for education – which raises even more issues and many questions. What instructional technologies can be useful in K-12 subjects? How can instructional technology be used in college and professional developmentRead MoreAspects Of Blended Learning : Technology Supports Diverse Classrooms3818 Words   |  16 PagesIt becomes an issue of how to train teachers to use instructional technology and truly integrate it into curriculum. It becomes an issue of how to make technology a problem-solving tool for students of all ages and learning styles. Some researchers believe blended learning to be the golden goose for education – which raises even more issues and many questions. What instructional technologies can be useful in K-12 subjects? How can instructional technology be used in college and professional developmentRead MoreSUCCEED: An Instructional Design Model3351 Words   |  14 Pages Every year, education majors across the U.S. face a barrage of learning theories and models in their education courses. Professors waste no time in introducing them to Pavlov and his dogs, Bloom’s Taxonomy, Maslow’s Hierarchy, Piaget, Skinner, Gagne, Bruner and more (Marsh, McFadden, and Price, n.d.). From the work of these great men come such learning theories as behaviorism, cognitivism, and constructivism, three paradigms that have shaped our current educational system. The next generation ofRead MoreLiterature Review Internet4548 Words   |  19 Pages Susan Genden Susan Genden aw0809 Abstract This literature review offers a commentary on programming applications specifically in the area of emerging online technologies for learning. Included is a brief history on the growth of these instructional technologies. We explore four literature reviews that discuss intelligent tutors (used on a one-to-one basis and in a collaborative environment), and virtual reality environments. These publications show students working online successfully inRead MoreQuestions On The Teacher s Assumptions About Social Context, Teaching, And Learning Affect The Dynamics Of Classroom1382 Words   |  6 Pagesspace, time, and activities to enhance instructional effectiveness. To enhance instructional effectiveness, some ways to organize space include setting tables in modular clusters. This allows for more interaction and group work as well as more floor space. Providing areas that are both quiet and active areas, while taking into account traffic patterns. Utilizing wall space for daily s chedule, calendar, sight words, examples, classroom rules also enhance instructional effectiveness. Making sure the ambianceRead MoreMy Performance And Portfolio Assessments From Using Assessment Data Drive Instructional Decisions841 Words   |  4 PagesThe next assignment I would like to showcase is my performance and portfolio assessments from Using Assessment Data to Drive Instructional Decisions. The performance assessment focused on a Pizza Party assignment. Students were required to add, subtract, multiply, and divide decimals using pictorial models and algorithms in order to calculate the cost the cost of pizza and drinks at each pizza parlor. They used their calculations to determine which restaurant had the best price. Students wereRead MorePlanning Collaborative Esl Lessons for Multiple Intelligences.3005 Words   |  13 PagesPlanning collaborative ESL lessons for Multiple Intelligences. Module 3 Approaches to teaching Module title: Tutor: XXXXXXXXXXX Module 3 Assignment. PGCEi participant Planning collaborative ESL lessons for Multiple Intelligences. 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The Need for Organ Donors Essay - 995 Words

Introduction: How do you feel when you have to wait for something you really, really want? What if it was something you couldn’t live without? By this time tomorrow, 18 people who are alive right now, will be dead. Not because they were in a car wreck, not because they were gunned down, no because their time at come, not even because they weren’t in the hospital, but simply because they couldn’t be given a life-saving transplant in time, eighteen people will die because the organ transplant they need will not be possible. Today I will explain the need for organ donors, how you can become an organ donor, and finally, how ones decisions can and is affecting society. There is a need for organ donors. Having enough people die isn’t the†¦show more content†¦Needing a transplant has affected everything that Corey and his family does. He has most of his life ill, very ill, in face often times when you would see him in the past he was green in color and in a lot of constant pain. Corey and his family have spent an unbelievable amount of time with doctors and traveling back and forth from Primary Children’s hospital. Organ donors are needed for students here even at BYU-I. This is something we need to take very serious because you never know when you might need one like Corey did, or someone in your family or maybe someone sitting here in this class today. I am sure that you can see the need for people like you to donate your organs. We can all become literally a life saver. The Coalition on Donation website states on donor can save up to eight people and help more than fifty others. For example, a donated Kidney can free two people from dialysis. Your heart could beat for someone else. Your corneas could give sight to two people. Organ donation is not about death, but rather life. You might be wondering how you can make sure that your organs are donated after your death. There are a number of ways to accomplish this. Fi rst of all, talk with your family about your decision to do so. They will be involved in the donation arrangements when you die. If they do not know your wishes of becoming a donor, your wishes may never be carried out. When you receive your Idaho’s driversShow MoreRelatedEssay The Growing Need for Organ Donors1628 Words   |  7 Pages â€Å"There is a need to instil in peoples hearts, especially in the hearts of the young, a genuine and deep appreciation of the need for brotherly love, a love that can find expression in the decision to become an organ donor.† Pope John Paul II stated in the Address to International Congress on Transplants. In a culture of death and self-centeredness it is important to prompt the youth to consider becoming an organ donor. The number of people in need of a transplant is growing quickly, and alreadyRead MoreThe Problem Of Organ Transplants1528 Words   |  7 PagesThe need for organs is a growing dilemma amongst America and countri es all over the world. Thousands of people sit on waiting lists in hopes to receive a new organ never knowing if they will actually receive one before their delicate organ gives up. Although many people are willing to be donors upon the time of their own death, the shortage of organs hangs over the patients and families who deal with the reality of an organ shortage every day. One solution that has been proposed is allowing peopleRead MorePersuasive Speech : Organ Donor1480 Words   |  6 Pagesaudience of the importance of becoming an organ donor to save lives. Thesis: Becoming an organ donor can give severely ill people another chance at living a normal life. I. Introduction A. Attention Getter: Imagine having a loved one who is in end stage organ failure and has been put on the organ transplant waiting list, in hopes getting the chance to live. B. Reason to Listen: With the long list of people waiting to receive an organ transplant, it is important thatRead MoreOrgan Donation And The Death Donor1538 Words   |  7 Pages Organ donation has been on the downward trend in the last couple of years while the need for healthy organ donors are on the rise. On the average day, twenty-two people die while waiting on the organ transplant list. While it can only take one person to be a living donor to save a life, and in the case of being a donor after death, one person can save up to eight people. Since the gap between organ donation and the need for organs continues to grow apart, something has to be done to reverse thisRead MoreAltruism Over Incentives For Organ Donation Essay1521 Words   |  7 PagesAltruism Over Incentives for Organ Donation Over the years, organ donation challenges and demands increased inversely in proportion to the organ shortages. The primary mission of donor’s organizations is to save as many terminally ill recipients at the end stages of their lives as possible with an end goal of giving these recipients a normal a life span. The significance of organ donation is to restore an ailing person’s quality of life. The ongoing issue of organ shortages may be a symptom ofRead MoreMoney Should Not Be Given as An Incentive to Donate Organs Essay1229 Words   |  5 PagesOrgan donation is when a donor with a healthy functioning organ gives a person who has a failing organ their organ; organ donation can occur when the donor is living, but certain organs-such as a heart-requires the donor to be deceased. Organ donation is a topic that is very important because it deals with whether people live or die, and it doesnt help that the amount of recipients for organs is greater than the amount of d onors. According to Brian Hansens Organ Shortage its stated that aboutRead MoreEssay On Organ Donation814 Words   |  4 Pages yet the process of organ donation and transplantation prolongs life. Problems with the supply and demand of viable organs lead to controversial topics and debates regarding solutions to suppress the gap between donors and recipients. One prevalent debate concerning these problems follows the question of whether to allow non-donors to receive organ transplants if needed even though they aren’t registered to donate their own organs. Although denying non-registered organ donors the possibility to receiveRead MoreThe Sources And Outcomes Of The Gift Of Life Essay1509 Words   |  7 PagesThe Sources and Outcomes of the Gift of Life. Organ donations stimulate positivity for the terminally ill despite all the challenges that derive prior. It can persevere the gift of life or duration period of time. The transplantation industry process may have a divine outcome before it withstands various undergoes. Organ donation sources may not be measured according to the demand or advantages, the transplantation organ shortage obstacles, independent characteristics or incentives, or social costRead MoreWaiting Before Waiting By Merriam Webster Essay1595 Words   |  7 Pagesmeal, it was how many days until one dies because they are in need of an organ to sustain life and all it has to offer. This is the thought of more than 4,500 Georgians who are currently waiting for an organ transplant according to Georgia Organ Donation records. Organ donation is a need that never come to a halt, instead it is a need that increase daily, becoming an organ donor is very simple task to help decrease the need for organs. Death is an inescapable part of life; one may experience it beforeRead MoreEssay on Outline for Organ Donation Speech1009 Words   |  5 PagesName: ashley singer Speech Type: Persuasive Organ Donation Organization Type: Comparative Advantages Pattern Attention Getter Type: Story, Quotation, or Poem Conclusion Type: Summary Goal/Purpose persuade my audience to give the gift of life and become organ donors. Introduction I. I have always decided i wanted to dedicate my organs to others once i have oassed but it was not until January of this year i learned the true value behind organ donation. II. Last January my brother was pronounced

Chemistry 105 Practice Test Answer Key Free Essays

string(47) " of water when placed in a graduated cylinder\." Chem 105 Practice Test 1 Note: There will not be this many questions on your test, I just wanted to give you as much practice as possible. Also, none of these exact questions will be on the test, just similar questions. Also, make sure you can do the homework, as I may have some questions similar to the homework questions. We will write a custom essay sample on Chemistry 105 Practice Test: Answer Key or any similar topic only for you Order Now 1. Molecules can be described as a. a mixture of two or more pure substances. b. a mixture of two or more elements that has a specific ratio between components. c. two or more atoms chemically joined together. d. a heterogeneous mixture e. a homogeneous mixture Answer: C 2. Dalton’s Atomic Theory states . that all elements have several isotopes. b. that matter is composed of small indestructible particles. c. that the properties of matter are determined by the properties of atoms. d. that energy is neither created nor destroyed during a chemical reaction. e. that an atom is predominantly empty space. Answer: B 3. Which of the following represents a hypothesis? a. Sodium reacts with water to form sodium hydroxide and hydrogen gas. b. Nitrogen gas is a fairly inert substance. c. Nickel has a silvery sheen. d. When a substance combusts, it combines with air. e. When wood burns, heat is given off. Answer: D . Which is true of a Scientific Theory (circle all that apply) a. It is a n interpretation for an observation b. It is a general explanation for the manifestation and behavior of all nature c. It can be validated or invalidated by experiment and observation d. It describes why things happen Answer: B, C, and D 5. Mass (circle all that apply) a. Is dependent on location (gravity) b. Is the amount of matter in a substance and remains the same regardless of location c. can be measured by using a scale or balance d. is measured in ml Answer: B and C 6. The states of matter are a. Solid and gas b. Liquid and gas . Gas, solid, and liquid d. Gas, air, and vapor Answer: C 7. A liquid (circle all that apply) a. Has a definite volume b. Has particles that are less orderly and can move about freely c. Has particles that are tightly packed d. Has no definite volume or shape e. Answer: A and B 8. Identify dry ice as a solid, liquid, or gas. a. solid b. liquid c. gas d. both solid and liquid Answer: A 9. When a gas is cooled (circle all that apply) a. Its molecules hav e fewer energetic collisions b. The motion of the gas particles decrease c. The motion of gas particles increase d. Nothing happens to the gas particles Answer: A and B 10. Classify each of the following as a mixture or a pure substance: a. Carbon dioxide _____________________ b. Blood ______________________ c. Helium (He) ______________________ d. Sugar water _______________________ Answer: A-pure substance; B-mixture; C-pure substance; D-mixture 11. Choose the pure substance from the list below. a. sea water b. sugar c. air d. lemonade e. milk Answer: B 12. Choose the heterogeneous mixture from the list below. a. Gatorade b. chlorine gas c. black coffee d. chicken noodle soup e. carbon (graphite) Answer: D 3. Which of the following statements about crystalline and amorphous solids is TRUE? a. A crystalline solid is composed of atoms or molecules arranged with long-range repeating order. b. An example of a crystalline solid is glass. c. An example of an amorphous solid is table salt (NaCl). d. An amorphous solid is composed of atoms or molecules with a majority of its volume empty. e. All of the above statements are TRUE. Answer: A 14. A substance that can’t be chemically broken down into simpler substances is considered to be a. a homogeneous mixture. b. an element. c. a heterogeneous mixture. d. compound. e. an electron. Answer: B 15. Two or more substances in variable proportions, where the composition is constant throughout are considered a. a compound. b. an element. c. a heterogeneous mixture. d. a homogeneous mixture. e. a crystalline solid. Answer: D 16. Which of the following are examples of physical change? a. sugar is dissolved in water. b. coffee is brewed. c. dry ice sublimes. d. ice (solid water) melts. e. All of these are examples of physical change. Answer: E 17. Which of the following are examples of a chemical change? a. coffee brewing b. water boiling c. nails rusting d. alt dissolves in water e. None of the above are chemical changes. Answer: C 18. Which of the following represents a physical property? a. Sodium metal is extremely reactive with chlorine gas. b. Mercury is a silver li quid at room temperature. c. the tendency of aluminum to â€Å"rust† d. the flammability of butane fuel e. the unreactive nature of argon gas Answer: B 19. Define thermal energy. a. Energy associated with the temperature of an object. b. Energy associated with the motion of an object. c. Energy associated with the force of an object. d. Energy associated with the gravity of an object. e. Energy associated with the position of an object. Answer: A 20. 33) Which of the following are examples of intensive properties? a. density b. volume c. mass d. None of the above are examples of intensive properties. e. All of the above are examples of intensive properties. Answer: A 21. If the temperature is 178 °F, what is the temperature in degrees celsius? a. 352 °C b. 451 °C c. 67 °C d. 81. 1 °C e. 378 °C Answer: D 22. If the temperature is 25 °C, what is the temperature in  °F? a. 45 °F b. 298. 15 °F c. 77 °F d. -3. 89 °F Answer: C 23. If the temperature is 25 °C, what is the temperature in K? a. 45 K b. 298 K c. 77 K . -3. 89 K Answer: B 24. Determine the density of an object that has a mass of 149. 8 g and displaces 12 . 1 mL of water when placed in a graduated cylinder. You read "Chemistry 105 Practice Test: Answer Key" in category "Essay examples" a. 8. 08 g/mL b. 1. 38 g/mL c. 12 . 4 g/mL d. 18. 1 g/mL e. 11. 4 g/mL Answer: C 25. A student perform s an experiment to determine the density of a sugar solution. She obtains the following results: 4. 11 g/mL, 4. 81 g/mL, 4. 95 g/mL, 3. 75 g/mL. If the actual value for the density of the sugar solution is 4. 75 g/mL, which statement below best describes her results? a. Her results are precise, but not accurate. b. Her results are accurate, but not precise. . Her results are both precise and accurate d. Her results are neither precise nor accurate. e. It isn’t possible to determine with the information given. Answer: D 26. Read the water level with the correct number of significant figures. a. 5 mL b. 5. 3 mL c. 5. 32 mL d. 5. 320 mL e. 5. 3200 mL Answer: B (Note: Remember, your last significant figure is the one that is uncertain. Because there are only whole number marks, the most certain significant figure is the 5, then we estimate where the meniscus of the liquid is between the 5 and the 6. This is why the correct reading is 5. 3, where the 3 is uncertain. If there were marks between the whole numbers, the correct answer would have 3 significant figures, since you could more accurately determine the volume. ) 27. Read the length of the metal bar with the correct number of significant figures. a. 20 cm b. 15 cm c. 15. 0 cm d. 15. 00 cm e. 15. 000 cm Answer: D 28. How many significant figures are in: 1009. 630 mL? a. 1009. 630 ml _____7______ b. 3. 408 x 104 m _____4_______ c. 0. 0005890 g ______4_______ 29. Complete the following calculations and report your answer with the correct number of significant figures: a. (249. 362 + 41)/63. 498 = ____4. 57________ b. 433. 621 + 0. 02 = ____433. 4_________ c. (965. 43 x 3. 911) + 9413. 4136 = ____1. 319 x 104 or 13190_____ 30. What wavelength of light would you report in units of nm, if the light had a wavelength of 7. 60 x 10-10 m? a. 7. 60 ? 10-3 nm b. 7. 60 ? 10-19 nm c. 1. 32 nm d. 0. 760 nm e. 760 nm Answer: D 31. How many cm3 are contained in 3. 77 ? 104 mm3? a. 3. 77 ? 104 cm3 b. 3. 77 ? 101 cm3 c. 3. 77 ? 10-10 cm3 d. 3. 77 ? 1020 cm3 e. 3. 77 ? 106 cm3 f. Answer: B 32. If a room requires 25. 4 square yards of carpeting, what is the area of the floor in units of ft2? (3 ft = 1 yd) a. 76. 2 ft2 b. 8. 47 ft2 c. 282 ft2 d. 229 ft2 e. 68. 6 ft2 Answer: D 33. Convert 15. km to miles. (use conversions in the back of your book. These will be given for the test a. 24. 1 miles b. 9. 32 miles c. 591 miles d. 33. 1 miles e. Answer: B 34. Gas is sold for $1. 399 per liter in Toronto, Canada. Your car needs 12. 00 gallons. How much will your credit card be charged in dollars? ( use conversions in the back of your book. These will be given for the test) a. $16. 79 b. $67. 15 c. $4. 44 d. $63. 54 Answer: D 35. Crude oil is an example of a. a compound. b. an element. c. a heterogeneous mixture. d. a homogeneous mixture. Answer: C 36. NaCl is an example of a. a compound. b. an element. c. a heterogeneous mixture. . a homogeneous mixture. Answer: A 37. A piece of metal ore weighs 8. 25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21. 25 mL to 26. 47 mL. What is the density of the ore? a. 0. 312 g/mL b. 0. 633 g/mL c. 1. 58 g/mL d. 3. 21 g/mL Answer: C 38. A mass of mercury occupies 0. 950 L. What volume would an equal mass of ethanol occupy? The density of mercury is and the density of ethanol is 0. 789 g/mL. a. 0. 0553 L b. 0. 0613 L c. 16. 3 L d. 18. 1 L Answer: C 39. Round the following number to four significant figures and express the result in standard exponential notation: 229. 13 a. 0. 2296 ? 103 b. 229. 6 c. 2. 296 ? 10-2 d. 2. 296 ? 102 e. 22. 96 ? 10-1 Answer: D 40. Round off 00907506 to four significant figures. a. 0091 b. 9076 c. 9100 d. 9. 075 ? 105 Answer: D 41. The diameter of an atom is approximately 1 ? 10-10 m. What is the diameter in millimeters? a. 1 ? 10-16 mm b. 1 ? 10-13 mm c. 1 ? 10-7 mm d. 1 ? 10-4 mm Answer: C 42. How many liters of wine can be held in a wine barrel whose capac ity is 26. 0 gal? 1 gal = 4 qt = 3. 7854 L. a. 1. 46 ? 10-4 b. 0. 146 c. 98. 4 d. 6. 87 ? 103 e. 6. 87 Answer: C 43. 128) How many liters of air are in a room that measures 10. 0 x 11. 0 ft and has an 8. 0 ft ceiling? 1 in. = 2. 54 cm (exactly); 1 L = 103 cm3. a. 2. 49 ? 104 b. 92. 8 c. 26. 8 d. 2. 68 ? 107 e. 8. 84 ? 105 Answer: A 44. 1) Which of the following is an example of the law of multiple proportions? a. A sample of chlorine is found to contain three times as much Cl-35 as Cl-37. b. Two different compounds formed from carbon and oxygen have the following mass ratios: 1. 33 g O: 1 g C and 2. 66 g O: 1 g C. c. Two different samples of table salt are found to have the same ratio of sodium to chlorine. d. The atomic mass of bromine is found to be 79. 90 amu. e. Nitrogen dioxide always has a mass ratio of 2. 8 g O: 1 g N. Answer: B 45. Identify the element that has an atomic number of 40. a. neon b. calcium c. zirconium d. bromine Answer: C 46. The atomic mass for cadmium is a. 48 b. 112. 41 c. 40. 08 d. 20 Answer: B 47. The mass number is equal to a. the sum of the sum of the electrons and protons. b. the sum of the sum of the neutrons and electrons. c. the sum of the number of protons, neutrons, and electrons. d. the sum of the number of protons and neutrons. Answer: D 48. What element is defined by the following information? p+ = 11n ° = 12 e- = 11 a. sodium b. vanadium c. magnesium d. titanium Answer: A 49. ) What does â€Å"X† represent in the following symbol? X a. silicon b. sulfur c. zinc d. ruthenium e. nickel Answer: A 50. 11) Determine the number of protons, neutrons and electrons in the following: X a. p+ = 18n ° = 18e- = 22 b. p+ = 18n ° = 22e- = 18 c. p+ = 22n ° = 18e- = 18 d. p+ = 18n ° = 22e- = 40 e. p+ = 40 n ° = 22e- = 18 Answer: B 51. Identify a cation. a. An atom that has lost an electron. b. An atom that has gained an electron. c. An atom that has lost a proton. d. An atom that has gained a proton. Answer: A 52. What element is defined by the following information? p+ = 17n ° = 20 e- = 17 a. calcium b. rubidium c. hlorine d. neon e. oxygen Answer: C 53. What species is represented by the following information? p+ = 17 n ° = 18 e- = 18 a. Cl b. Cl- c. Ar d. Ar+ e. Kr f. Answer: B 54. Give the number of electrons for carbon-14, with a -2 charge . a. 7 b. 4 c. 6 d. 8 Answer: D 55. Predict the charge that an aluminum ion would have. a. 5- b. 1+ c. 1- d. 2+ e. 3+ Answer: E 56. Predict the charge that the ion formed from bromine would have. a. 1- b. 2+ c. 1+ d. 4+ e. 2- f. Answer: A 57. Which of the following elements is NOT a metal? a. Ba b. Mg c. Xe d. Pb e. Ga Answer: C 58. Which of the following elements is a noble gas? a. Ar b. Br c. N d. O e. K Answer: A 59. Which of the following elements is an alkali metal? a. Zn b. Xe c. F d. Li e. Ca Answer: D 60. Which of the following statements is FALSE? a. Anions are usually larger than their corresponding atom. b. Metals tend to form cations c. Atoms are usually larger than their corresponding cation. d. The halogens tend to form 1+ ions. e. Nonmetals tend to gain electrons. Answer: D 61. Which of the following does NOT describe a nonmetal? a. Tend to gain electrons b. Found in the upper right hand corner of the periodic table. c. Poor conductor of electricity d. Nonmetals are generally unreactive. e. Poor conductor of heat. Answer: D 62. Silver has an atomic mass of 107. 868 amu. The Ag-109 isotope (108. 905 amu) is 48. 16%. What is the amu of the other isotope? a. 106. 905 amu b. 106. 908 amu c. 106. 903 amu d. D) 106. 911 amu Answer: A 63. Which of the following contains the MOST atoms? You shouldn’t need to do a calculation here. a. 10. 0 g Ne b. 10. 0 g He c. 10. 0 g Ar d. 10. 0 g Kr e. 10. 0 g Mg Answer: B 64. How many silver atoms are contained in 3. 75 moles of silver? a. 6. 23 ? 1024 silver atoms b. 2. 26 ? 1024 silver atoms c. 1. 61 ? 1023 silver atoms d. 2. 44 ? 1026 silver atoms e. 6. 50 ? 1025 silver atoms Answer: B 5. How many moles of potassium are contained in 449 g of potassium? a. 11. 5 moles b. 17. 6 moles c. 69. 2 moles d. 23. 9 moles e. 41. 5 moles Answer: A 66. What mass, in kg, does 5. 84 moles of titanium (Ti) have? a. 0. 352 kg b. 0. 122 kg c. 0. 820 kg d. 0. 280 kg e. 0. 632 kg Answer: D 67. How many moles of Cs are contained in 595 kg of Cs? a. 2. 23 ? 102 moles Cs b. 4. 48 ? 103 moles Cs c. 7. 91 ? 104 moles Cs d. 1. 26 ? 103 moles Cs e. 5. 39 ? 102 moles Cs Answer: B 68. How many iron atoms are contained in 354 g of iron? a. 2. 62 ? 1025 Fe atoms b. 2. 13 ? 1026 Fe atoms c. 4. 69 ? 1024 Fe atoms d. 3. 82 ? 1024 Fe atoms . 9. 50 ? 1022 Fe atoms Answer: D 69. Calculate the mass, in kg, of 4. 87 x 1025 atoms of Zn. a. 5. 29 kg b. 1. 89 kg c. 8. 09 kg d. 1. 24 kg e. 1. 09 kg Answer: A Match the following. A) Fe B) C C) Mg D) Si E) K 70. magnesium 71. carbon 72. potassium 73. iron 74. silicon Answers: 70) C 71) B 72) E 73) A 74) D 75. Give the name of the element whose symbol is Na. Answer: sodium 76. An atom of 131Xe contains ________ electrons. a. 131 b. 185 c. 77 d. 123 e. 54 Answer: E 77. An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol for the ion is ________. a. 17O2- b. 17O2+ c. 19F+ d. 19F- e. 17Ne2+ Answer: A 78. How many protons does the Br- ion possess? a. 34 b. 36 c. 6 d. 8 e. 35 Answer: E 79. Predict the charge of the most stable ion of potassium. a. 3+ b. 1- c. 2+ d. 2- e. 1+ Answer: E 80. What is the chemical symbol for mercury? a. Ag b. Au c. Hg d. Pb Answer: C 81. Which are isotopes? An atom that has an atomic number of 20 and a mass number of 42 is an isotope of an atom that has a. an atomic number of 21 and a mass number of 42. b. an atomic number of 20 and a mass number of 40. c. 22 neutrons and 20 protons. d. 22 protons and 20 neutrons. Answer: B 82. How many protons (p) and neutrons (n) are in an atom of Sr? a. 38 p, 52 n . 38 p, 90 n c. 52 p, 38 n d. 90 p, 38 n Answer: A 83. The mass number of an atom of 128Xe is ________. a. 54 b. 182 c. 74 d. 128 e. 120 Answer: D 84. What is the identity of element Q if the ion Q2+ contains 10 electrons? a. C b. O c. Ne d. Mg Answer: D 85. In which of the following sets do all species have the same number of electrons? a. F-, Ne, Mg2+ b. Ge, S e2-, Br- c. K+, Rb+, Cs+ d. Br, Br-, Br+ Answer: A 86. Argon belongs to the ________ group of the periodic table. a. alkali metal b. alkaline earth metal c. halogen d. noble gas Answer: D 87. Which of the following elements has chemical properties similar to tellurium? . fluorine b. hydrogen c. nitrogen d. sulfur Answer: D 88. An ionic bond is best described as: a. the sharing of electrons. b. the transfer of electrons from one atom to another. c. the attraction that holds the atoms together in a polyatomic ion. d. the attraction between 2 nonmetal atoms. e. the attraction between 2 metal atoms. Answer: B 89. What is the empirical formula for C4H10O2? a. C2H5O b. CHO c. C2H4O d. CHO2 e. CH2O Answer: A 90. Write a possible molecular formula for C4H4O. a. C8H8O2 b. C12H12O2 c. C2H2O d. C8H8O Answer: A 91. Which of the following is an atomic element? a. Br b. H c. N d. O e. Mg Answer: E 92. Which of the following is a molecular element? a. Kr b. Ag c. S d. Mg e. Ti Answer: C 93. Which of the following is a molecular compound? a. CuCl2 b. KCl c. NaNO3 d. CH3Cl e. RbBr f. Answer: D 94. Which of the following is an ionic compound? a. SCl2 b. Mg3(PO4)2 c. Cl2O d. CH2O e. PF5 Answer: B 95. Write the formula for the compound formed between potassium and sulfur. a. KS b. KS2 c. K2S d. K2SO3 e. K3S2 Answer: C 96. Give the name for SnO. a. tin (I) oxide b. tin (II) oxide c. tin (III) oxide d. tin (IV) oxide Answer: B 97. Write the formula for strontium nitride. a. Sr3N2 b. Sr(NO3)2 c. SrN d. Sr2N3 e. Sr(NO2)2 Answer: A 98. Write the name for Sn(SO4)2. Remember that Sn forms several ions. a. tin (I) sulfite b. tin (IV) sulfate c. tin sulfide d. tin (II) sulfite e. tin (I) sulfate Answer: B 99. Determine the name for CoCl2†¢6H2O. Remember that Co forms several ions. a. cobalt chloride hydrate b. cobalt (I) chloride heptahydrate c. cobalt (II) chloride heptahydrate d. cobalt (II) chloride hexahydrate e. cobalt (I) chloride Answer: D 100. Write the formula for copper (II) sulfate pentahydrate. a. Cu2SO3†¢H5 b. Cu2S†¢H2O c. CuS†¢5H2O d. (CuSO4)5 e. CuSO4†¢5H2O Answer: E 101. Determine the name for H2CO3. a. carbonous acid b. dihydrogen carbonate c. carbonic acid . hydrocarbonic acid e. hydrocarbide acid Answer: C 102. Identify the formula for nitric acid. a. HNO3 b. HNO2 c. HNO d. HNO4 Answer: A 103. Determine the name for P4O10. a. phosphorus (IV) oxide b. diphosphorus pentoxide c. phosphorus oxide d. phosphorus (II) oxide e. tetraphosphorus decoxide Answer: E 104. Calculate the mo lar mass for Mg(ClO4)2. a. 223. 21 g/mol b. 123. 76 g/mol c. 119. 52 g/mol d. 247. 52 g/mol e. 75. 76 g/mol Answer: A 105. Calculate the molar mass of Al(C2H3O2)3. a. 86. 03 g/mol b. 204. 13 g/mol c. 56. 00 g/mol d. 258. 09 g/mol e. 139. 99 g/mol Answer: B 106. How many millimoles of Ca(NO3)2 contain 4. 8 ? 1022 formula units of Ca(NO3)2? The molar mass of Ca(NO3)2 is 164. 10 g/mol. a. 12. 6 mmol Ca(NO3)2 b. 13. 0 mmol Ca(NO3)2 c. 20. 7 mmol Ca(NO3)2 d. 79. 4 mmol Ca(NO3)2 e. 57. 0 mmol Ca(NO3)2 Answer: D 107. How many C2H4 molecules are contained in 45. 8 mg of C2H4? The molar mass of C2H4 is 28. 05 g/mol. a. 9. 83 ? 1020 C2H4 molecules b. 7. 74 ? 1026 C2H4 molecules c. 2. 71 ? 1020 C2H4 molecules d. 3. 69 ? 1023 C2H4 molecules e. 4. 69 ? 1023 C2H4 molecules Answer: A 108. What is the mass of 9. 44 ? 1024 molecules of NO2? The molar mass of NO2 is 46. 01 g/mol. a. 205 g b. 294 g c. 721 g d. 341 g e. 685 g Answer: C 109. Calculate the mass percent composition of sulfur in Al2(SO4)3. a. 28. 12 % b. 9. 372 % c. 42. 73 % d. 21. 38 % e. 35. 97 % Answer: A 110. How many moles of N2O3 contain 2. 55 ? 1024 oxygen atoms? (change the molecule) a. 1. 41 moles N2O3 b. 4. 23 moles N2O3 c. 12. 7 moles N2O3 d. 7. 87 moles N2O3 e. 2. 82 moles N2O3 Answer: A 111. How many moles of PCl3 contain 3. 68 ? 1025 chlorine atoms? a. 61. 1 moles PCl3 b. 20. 4 moles PCl3 c. 16. 4 moles PCl3 d. 54. 5 moles PCl3 e. 49. 1 moles PCl3 Answer: B 112. How many sodium ions are contained in 99. 6 mg of Na2SO3? The molar mass of Na2SO3 is 126. 05 g/mol. a. 1. 52 ? 1027 sodium ions . 4. 76 ? 1020 sodium ions c. 2. 10 ? 1021 sodium ions d. 1. 05 ? 1021 sodium ions e. 9. 52 ? 1020 sodium ions Answer: E 113. Determine the volume of hexane that contains 5. 33 ? 1022 molecules of hexane. The density of hexane is 0. 6548 g/mL and its molar mass is 86. 17 g/mol. a. 8. 59 mL b. 13. 5 mL c. 7. 40 mL d. 12. 4 mL e. 11. 6 mL Answer: E 114. Determi ne the molecular formula of a compound that has a molar mass of 92. 0 g/mol and an empirical formula of NO2. a. N2O3 b. N3O6 c. N2O4 d. NO2 e. N2O5 Answer: C 115. Determine the empirical formula for a compound that is 36. 86% N and 63. 14% O by mass. a. NO b. N2O c. NO2 d. N2O3 e. NO3 Answer: D 116. Write a balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapor. a. 2 C2H6(g) + 7 O2(g) 4 CO2(g) + 6 H2O(g) b. C2H6(g) + 5 O(g) 2 CO(g) + 3 H2O(g) c. 2 C2H6(g) + 5 O2(g) 4 CO(g) + 6 H2O(g) d. C2H6(g) + 7 O(g) 2 CO2(g) + 3 H2O(g) e. 2 CH3(g) + 5 O(g) 2 CO(g) + 3 H2O(g) Answer: C 117. Which of the following is one possible form of pentane? a. CH3CH2CH2CH2CH3 b. CH3CH=CHCH2CH3 c. CH3CH2CH2CH2CH2CH3 d. CH3CH2CH2CH2CH2NH2 e. CH3CH2-O-CH2CH2CH3 Answer: A 118. List the elements in a hydrocarbon Answer: hydrogen and carbon 119. What type of bonding is found in the compound OF2? a. covalent bonding b. hydrogen bonding c. ionic bonding d. metallic bonding Answer: A 120. In which set do all elements tend to form cations in binary ionic compounds? a. K, Ga, O b. Sr, Ni, Hg c. N, P, Bi d. O, Br, I Answer: B 121. Rb2S is named a. rubidium disulfide. b. rubidium sulfide. c. rubidium(II) sulfide. d. rubidium sulfur. Answer: B 122. An aqueous solution of H2S is named a. hydrosulfuric acid. b. hydrosulfurous acid. c. sulfuric acid. d. sulfurous acid. Answer: A 123. What is the molar mass of nitrogen gas? a. 14. 0 g/mol b. 28. 0 g/mol c. 6. 02 ? 1023 g/mol d. 1. 20 ? 023 g/mol Answer: B 124. What mass of carbon dioxide, C O2, contains the same number of molecules as 3. 00 g of trichlorofluoromethane, CCl3F? a. 0. 106 g b. 0. 961 g c. 1. 04 g d. 9. 37 g e. Answer: B 125. Which of the following has the greatest mass? a. 3. 88 ? 1022 molecules of O2 b. 1. 00 g of O2 c. 0. 0312 mol of O2 d. All of the above have the same mass. Answer: A 126. A sample of pure calcium fluoride with a mass of 15. 0 g contains 7. 70 g of calcium. How much calcium is contained in 40. 0 g of calcium fluoride? a. 2. 27 g b. 7. 70 g c. 15. 0 g d. 20. 5 g Answer: D 127. What is the empirical formula of a compound that is 62. % C, 10. 4% H, and 27. 5% O by mass? a. C3HO b. C6HO3 c. C6H12O2 d. C5H10O2 e. C3H6O Answer: E 128. How many oxygen atoms are there in 7. 00 g of sodium dichromate, Na2Cr2O7? a. 0. 187 oxygen atoms b. 2. 30 ? 1021 oxygen atoms c. 1. 60 ? 1022 oxygen atoms d. 1. 13 ? 1023 oxygen atoms Answer: D 129. Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 0. 80 g of methane reacts with 3. 2 g of oxygen to produce 2. 2 g of carbon dioxide? a. 1. 8 g b. 2. 2 g c. 3. 7 g d. 4. 0 g Answer: A 130. Combustion analysis of 1. 200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2. 86 g of CO2 and 1. 134 g of H2O. What is the empirical formula of the compo und? a. C2H5O b. C2H5O2 c. C2H10O3 d. C3H8O2 Answer: D 131. What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest, whole-number coefficients? _____ C2H6O (l) + _____ O2(g) _____ CO2(g) + _____ H2O(l) a. 9 b. 7 c. 5 d. 3 Answer: D 132. Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-numbered coefficients? a. 1 b. 2 c. 3 d. none of these Answer: C How to cite Chemistry 105 Practice Test: Answer Key, Essay examples