Chapter 1 - Chapter 1: Chemistry: The Study of Change 1. A...

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Page 1 Chapter 1: Chemistry: The Study of Change 1. A tentative explanation for a set of observations that can be tested by further experimentation is referred to as A) a hypothesis. B) a law. C) a theory. D) none of the above. Ans: A Category: Easy Section: 1.3 2. A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as A) a hypothesis. B) a law. C) a theory. D) none of the above. Ans: B Category: Easy Section: 1.3 3. A unifying principle that explains a body of facts and relations is referred to as A) a hypothesis. B) a law. C) a theory. D) none of the above. Ans: C Category: Easy Section: 1.3 4. Complete the following sentence. A hypothesis is A) a tentative explanation for a set of observations that can be tested by further experimentation. B) a statement describing a relationship between phenomena that is always the same under the same conditions. C) a unifying principle that explains a body of facts and relations. D) a model used to visualize the invisible. Ans: A Category: Easy Section: 1.3 5. Complete the following sentence. A scientific law is A) a tentative explanation for a set of observations that can be tested by further experimentation. B) a statement describing a relationship between phenomena that is always the same under the same conditions. C) a unifying principle that explains a body of facts and relations. D) a model used to visualize the invisible. Ans: B Category: Easy Section: 1.3 6. Complete the following sentence. A theory is A) a tentative explanation for a set of observations that can be tested by further experimentation. B) a statement describing a relationship between phenomena that is always the same under the same conditions. C) a unifying principle that explains a body of facts and relations. D) a model used to visualize the invisible. Ans: C Category: Easy Section: 1.3
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Chapter 1: Chemistry: The Study of Change Page 2 7. Choose the response that includes all the items listed below that are pure substances. i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup A) i, iii, v B) ii, iv C) i, iii, iv D) iv only E) all of them are pure Ans: B Category: Easy Section: 1.3 8. Which of the following is an example of a physical property? A) corrosiveness of sulfuric acid B) toxicity of cyanide C) flammability of gasoline D) neutralization of stomach acid with an antacid E) lead becomes a liquid when heated to 601 o C Ans: E Category: Easy Section: 1.6 9. Which one of the following is an example of a physical property? A) dynamite explodes D) ice floats on top of liquid water B) meat rots if it is not refrigerated E) a silver platter tarnishes C) gasoline burns Ans: D Category: Easy Section: 1.6 10. Which one of the following represents a physical change?
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This note was uploaded on 02/08/2012 for the course CHEM 161 taught by Professor Shaklovich during the Spring '10 term at Harvard.

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Chapter 1 - Chapter 1: Chemistry: The Study of Change 1. A...

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