General Chemistry The Essential Concepts, 7e Raymo
General Chemistry The Essential Concepts, 7e Raymo
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General Chemistry The Essential Concepts, 7e Raymond Chang, Kenneth Goldsby (Test Bank)
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General Chemistry The Essential Concepts, 7e Raymo
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General Chemistry The Essential Concepts, 7e Raymo
General Chemistry The Essential Concepts, 7e Raymond Chang, Kenneth Goldsby (Test Bank)
General Chemistry The Essential Concepts, 7e Raymond Chang, Kenneth Goldsby (Test Bank)
Page 1 Chapter 01: Introduction 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: 1.2 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: 1.2 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: 1.2 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: 1.2 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: 1.2 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: 1.2 (General Chemistry The Essential Concepts, 7e Raymond Chang, Kenneth Goldsby)
(Test Bank all Chapter) Chapter 01: Introduction 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: 1.2 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 C Ans: E Category: Easy Section: 1.4 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 i s not refrigerated E) a silver platter tarnishes C) gasoline burns Ans: D Category: Easy Section: 1.4 10. Which one of the following represents a physical change? A) water, when heated to 100 C, forms steam B) bleach turns hair yellow C) sugar, when heated, becomes brown D) milk turns sour E) apples, when exposed to air, turn brown Ans: A Category: Easy Section: 1.4 11. All of the following are properties of sodium. Which one is a physical property of sodium? A) It is a surface turns black when first exposed to air. B) It is a solid at 25 C and changes to a liquid when heated to 98 C. C) When placed in water it sizzles and a gas is formed. D) When placed in contact with chlorine it forms a compound that melts at 801 C. E) Sodium is never found as the pure metal in nature. Ans: B Category: Easy Section: 1.4 12. All of the following are properties of tin. Which one is a chemical property of tin? A) Tin can be hammered into a thin sheet. B) At –40C a sheet of tin crumbles to a gray powder. C) Tin melts at 231.9 C. D) When a bar of tin is bent, it emits an audible “cry”. E) Tin erodes when added to hydrochloric acid, and a clear gas forms. Ans: E Category: Medium Section: 1.4 Chapter 01: Introduction Page 3 13. Which one of the following represents a chemical change? A) boiling water to form steam B) burning a piece of coal C) heating lead until it melts D) mixing iron filings and sand at room temperature E) breaking glass Ans: B Category: Medium Section: 1.4 14. Which of the following does not represent a chemical change? A) a freshly cut apple turns brown B) milk turns sour on standing at room temperature C) when cooled to 0 C, liquid water becomes ice D) frying an egg E) fermentation of sugar to alcohol Ans: C Category: Easy Section: 1.4 15. The S I prefixes nano and deci represent, respectively: A) 10– 9 and 10– 6. D) 109 and 10– 6. B) 106 and 10– 3. E) 10– 9 and 10– 1. C) 103 and 10– 3. Ans: E Category: Easy Section: 1.7 16. The SI prefixes milli and mega represent, respectivel y: A) 106 and 10– 6. D) 10– 3 and 109. B) 10– 3 and 106. E) 10– 6 and 10– 3. C) 103 and 10– 6. Ans: B Category: Easy Section: 1.7 17. The SI prefixes kilo and centi represent, respectively: A) 103 and 10– 2. D) 10– 6 and 102. B) 106 and 10– 1. E) 102 and 10– 3. C) 10– 3 and 10– 2. Ans: A Category: Easy Section: 1.7 18. A nanometer corresponds to: A) 10– 2 meters. D) 10– 9 meters. B) 10– 3 meters. E) 10– 12 meters. C) 10– 6 meters. Ans: D Category: Easy Section: 1.7 19. A microliter corresponds to: A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10– 12 liters. Ans: C Category: Easy Section: 1.7 Chapter 01: Introduction Page 4 20. 6.0 km is how many micrometers? A) 6.0 106 µm D) 1.7 10– 4 µm B) 1.7 10– 7 µm E) 6.0 103 µm C) 6.0 109 µm Ans: C Category: Medium Section: 1.7 21. 2.4 km is how many millimeters? A) 2,400 mm D) 2.4 106 mm B) 2.4 104 mm E) 2.4 10– 5 mm C) 2.4 105 mm Ans: D Category: Medium Section: 1.7 22. How many milliliters is 0.005 L? A) 0.5 mL B) 5 mL C) 0.50 mL D) 0.000005 mL E) 200 mL Ans: B Category: Medium Section: 1.7 23. Express 7,500 nm as picometers. A) 7.50 pm B) 75.0 pm C) 750 pm D) 7.5 106 pm E) 7.5 1012 pm Ans: D Category: Medium Section: 1.7 24. The diameter of Earth is 12.7 Mm. Express this diameter in centimeters. A) 1.27 105 cm D) 1.27 108 cm B) 1.27 106 cm E) 1.27 109 cm C) 1.27 107 cm Ans: E Category: Medium Section: 1.7 25. In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? A) 1.8 109 nm D) 1.8 10– 5 nm B) 1.8 107 nm E) 1.8 10– 10 nm C) 1.8 101 nm Ans: B Category: Medium Section: 1.7 26. Which of the following represents the largest mass? A) 2.0 102 mg D) 2.0 102 cg B) 0.0010 kg E) 10.0 dg C) 1.0 105 ng Ans: D Category: Medium Section: 1.7 27. Lead melts at 601.0 C. What temperature is this in oF? A) 302F B) 365 F C) 1,050 F D) 1,082 F E) 1,114 F Ans: E Category: Medium Section: 1.7
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