(Test Bank) Chemistry: The Central Science

Et Al., 12

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12th Edition

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Author(s): Et Al.

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1 The Central Science, 12th Edition Chemistry: The Central Science, 12e (Brown et al.) Chapter 1 Introduction: Matter and Measurement 1.1 Multiple -Choice Questions 1) In the following list, only is not an example of matter. A) planets B) light C) dust D) elemental phosphorus E) table salt Answer: B Diff: 2 Page Ref: Sec. 1.1 2) What is the physical state in which matter has no specific shape but does have a specific volume? A) gas B) solid C) liquid D) salts E) ice Answer: C Diff: 1 Page Ref: Sec. 1.2 3) The law of constant composition applies to . A) solutions B) heterogeneous mixtures C) compounds D) homogeneous mixtures E) solids Answer: C Diff: 1 Page Ref: Sec. 1.2 4) A combination of sand, salt, and water is an example of a . A) homogeneous mixture B) heterogeneous mixture C) compound D) pure substance E) solid Answer: B Diff: 1 Page Ref: Sec. 1.2 2 5) A small amount of salt dissolved in water is an example of a _. A) homogeneous mixture B) heterogeneous mixture C) compound D) pure substance E) solid Answer: A Diff: 1 Page Ref: Sec. 1.2 6) Which one of the following has the element name and symbol correctly matched? A) P, potassium B) C, copper C) Mg, manganese D) Ag, silver E) Sn, silicon Answer: D Diff: 1 Page Ref: Sec. 1.2 7) Which one of the following has the element name and symbol correctly matched? A) S, sodium B) Tn, tin C) Fe, iron D) N, neon E) B, bromine Answer: C Diff: 1 Page Ref: Sec. 1.2 8) Which one of the following elements has a symbol that is not derived from its foreign name? A) tin B) aluminum C) mercury D) copper E) lead Answer: B Diff: 2 Page Ref: Sec. 1.2 9) Which one of the following is a pure substance? A) concrete B) wood C) salt water D) elemental copper E) milk Answer: D Diff: 1 Page Ref: Sec. 1.2 3 10) Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting? A) heterogeneous mixture B) compounds C) homogeneous mixture D) elements E) solutions Answer: A Diff: 3 Page Ref: Sec. 1.2 11) Which states of matter are significantly compressible? A) gases only B) liquids only C) solids only D) liquids and gases E) solids and liquids Answer: A Diff: 1 Page Ref: Sec. 1.2 12) For which of the following can the composition vary? A) pure substance B) element C) both homogeneous and heterogeneous mixtures D) homogeneous mixture E) heterogeneous mixture Answer: C Diff: 2 Page Ref: Sec. 1.2 13) If matter is uniform throughout and cannot be separated into other substances by physical means, it is . A) a compound B) either an element or a compound C) a homogeneous mixture D) a heterogeneous mixture E) an element Answer: B Diff: 2 Page Ref: Sec. 1.2 14) An element cannot _ . A) be part of a heterogeneous mixture B) be part of a homogeneous mixture C) be separated into other substances by chemical means D) interact with other elements to form compounds E) be a pure substance Answer: C Diff: 2 Page Ref: Sec. 1.2 4 15) Homogeneous mixtures are also known as . A) solids B) compounds C) elements D) substances E) solutions Answer: E Diff: 1 Page Ref: Sec. 1.2 16) The law of constant composition says . A) that the composition of a compound is always the same B) that all substances have the same composition C) that the composition of an element is always the same D) that the composition of a homogeneous mixture is always the same E) that the composition of a heterogeneous mixture is always the same Answer: A Diff: 1 Page Ref: Sec. 1.2 17) Which of the following is an illustration of the law of constant composition? A) Water boils at 100°C at 1 atm pressure. B) Water is 11% hydrogen and 89% oxygen by mass. C) Water can be separated into other substances by a chemical process. D) Water and salt have different boiling points. E) Water is a compound. Answer: B Diff: 3 Page Ref: Sec. 1.2 18) In the following list, only is not an example of a chemical reaction. A) dissolution of a penny in nitric acid B) the condensation of water vapor C) a burning candle D) the formation of polyethylene from ethylene E) the rusting of iron Answer: B Diff: 2 Page Ref: Sec. 1.3 19) Gases and liquids share the property of . A) compressibility B) definite volume C) incompressibility D) indefinite shape E) definite shape Answer: D Diff: 1 Page Ref: Sec. 1.3 5 20) Of the following, only is a chemical reaction. A) melting of lead B) dissolving sugar in water C) tarnishing of silver D) crushing of stone E) dropping a penny into a glass of water Answer: C Diff: 1 Page Ref: Sec. 1.3 21) Which one of the following is not an intensive property? A) density B) temperature C) melting point D) mass E) boiling point Answer: D Diff: 2 Page Ref: Sec. 1.3 22) Which one of the following is an intensive property? A) mass B) temperature C) heat content D) volume E) amount Answer: B Diff: 2 Page Ref: Sec. 1.3 23) Of the following, only is an extensive property. A) density B) mass C) boiling point D) freezing point E) temperature Answer: B Diff: 2 Page Ref: Sec. 1.3 24) Which of the following are chemical processes? 1. rusting of a nail 2. freezing of water 3. decomposition of water into hydrogen and oxygen gases 4. compression of oxygen gas A) 2, 3, 4 B) 1, 3, 4 C) 1, 3 D) 1, 2 E) 1, 4 Answer: C Diff: 3 Page Ref: Sec. 1.3 25) In the following list, only is not an example of a chemical reaction. 6 A) burning a plastic water bottle B) the production of hydrogen gas from water C) the tarnishing of a copper penny D) chopping a log into sawdust E) charging a cellular phone Answer: C Diff: 2 Page Ref: Sec. 1.3 26) Of the following, is the smallest mass. A) 25 kg B) 2.5 × 10-2 mg C) 2.5 × 1015 pg D) 2.5 × 109 fg E) 2.5 × 1010 ng Answer: D Diff: 2 Page Ref: Sec. 1.4 27) Of the following, is the largest mass. A) 25 kg B) 2.5 × 10-2 mg C) 2.5 × 1015 pg D) 2.5 × 109 fg E) 2.5 × 1010 ng Answer: A Diff: 2 Page Ref: Sec. 1.4 28) Which one of the following is the highest temperature? A) 38 °C B) 96 °F C) 302 K D) none of the above E) the freezing point of water Answer: A Diff: 3 Page Ref: Sec. 1.4 29) Which one of the following is the highest temperature? A) The boiling point of water B) 220 °F C) 373 K D) 100°C E) All of the above are identical temperatures Answer: B Diff: 3 Page Ref: Sec. 1.4 7 30) Which of the following is (are) the lowest temperature? A) The freezing point of water B) 5 °C C) 30 °F D) 280 K E) A and D Answer: C Diff: 3 Page Ref: Sec 1.4 31) Which one of the following is true about the liter? A) It is the SI base unit for volume. B) It is equivalent to a cubic decimeter. C) It is slightly smaller than a quart. D) It contains 106 cubic centimeters. E) It is slightly smaller than a gallon. Answer: B Diff: 4 Page Ref: Sec. 1.4 32) Of the objects below, is the most dense. A) an object with a volume of 2.5 L and a mass of 12.5 kg B) an object with a volume of 139 mL and a mass of 93 g C) an object with a volume of 0.00212 m 3 and a mass of 4.22 × 104 mg D) an object with a volume of 3.91 × 10-24 nm3 and a mass of 7.93 × 10-1 ng E) an object with a volume of 13 dm 3 and a mass of 1.29 × 10 3 g Answer: D Diff: 4 Page Ref: Sec. 1.4 33) Which calculation clearly shows a conversion between temperatures in degrees Celsius, t(°C), and temperature in Kelvins, T(K)? A) T(K) = t(°C) + 273.15 B) T(K) = 273.15 - t(°C) C) T(K) = [t(°C) - 32] / 1.8 D) T(K) = [t(°C) + 32] × 1.8 E) T(K) = t(°C) Answer: A Diff: 1 Page Ref: Sec. 1.4 34) Express the temperature, 422.35 K, in degrees Celsius. A) 792.23 °C B) 149.20 °C C) 695.50 °C D) 50.89 °C E) 22.78 °C Answer: B Diff: 2 Page Ref: Sec. 1.4 8 35) Which of the following liquids has the greatest density? A) 13 with a mass of 23 g B) 3.5 cm3 with a mass of 10 g C) 0.022 cm3 with a mass of 0.10 g D) 54 cm3 with a mass of 45 g E) 210 cm 3 with a mass of 12 g Answer: C Diff: 2 Page Ref: Sec. 1.4 36) You have to calculate the mass of a 30.0 mL liquid sample with density of 1.52 g/mL, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass? A) If 1 mL of a liquid has the mass of 1.52 g, then 30.0 mL has the mass of g. B) If 1.52 mL of a liquid has the mass of 1 g, then 30.0 mL has the mass of g. Answer: A Diff: 2 Page Ref: Sec. 1.4 37) You have to calculate the volume of a gas sample with mass of 1.000 × 103 g and density of 1.027 g/L, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass? A) If 1.027 g of a gas takes up a volume of 1 L, then 1.000 × 103 g of the same gas takes up a volume of . B) If 1.027 L of gas has a mass of 1 g, then L has the mass of 1.000 × 103 g. Answer: A Diff: 2 Page Ref: Sec. 1.4 38) Osmium has a density of 22.6 g/cm 3. What volume (in cm3) would be occupied by a 21.8 g sample of osmium? A) 0.965 B) 1.04 C) 493 D) 2.03 × 10-3 E) 2.03 × 103 Answer: A Diff: 2 Page Ref: Sec. 1.4 39) Gold has a density of 0.01932 kg/cm 3. What volume (in cm 3) would be occupied by a 33.3 g sample of gold? A) 0.663 B) 5.80 x 10-4 C) 5.80 D) 0.581 E) 1.72 Answer: E Diff: 1 Page Ref: Sec. 1.4 9 40) Iron has a density of 7.9 g/cm 3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm? A) 2.1 x 104 g B) 4.3 x 102 g C) 1.3 x 103 g D) 1.4 g E) 2.3 x 10-2 g Answer: C Diff: 1 Page Ref: Sec. 1.4 41) A cube of an unknown metal measures 1.61 mm on one side. The mass of the cube is 36 mg. Which of the following is most likely the unknown metal? A) copper B) rhodium C) niobium D) vanadium E) zirconium Answer: C Diff: 3 Page Ref: Sec. 1.4 42) Precision refers to . A) how close a measured number is to other measured numbers B) how close a measured number is to the true value C) how close a measured number is to the calculated value D) how close a measured number is to zero E) how close a measured number is to infinity Answer: A Diff: 1 Page Ref: Sec. 1.4 43) Accuracy refers to . A) how close a measured number is to zero B) how close a measured number is to the calculated value C) how close a measured number is to other measured numbers D) how close a measured number is to the true value E) how close a measured number is to infinity Answer: D Diff: 1 Page Ref: Sec. 1.4 10 44) Which of the following has the same number of significant figures as the number 1.00310? A) 1 × 106 B) 199.791 C) 8.66 D) 5.119 E) 100 Answer: B Diff: 2 Page Ref: Sec. 1.4 45) Acceleration due to gravity of a free -falling object is 9.8 m/s 2. Express this in millimeters/millisecond 2. A) 9.8 × 10-9 B) 9.8 × 103 C) 9.8 × 10-6 D) 9.8 × 106 E) 9.8 × 10-3 Answer: E Diff: 2 Page Ref: Sec. 1.4 46) If an object is accelerating at a rate of 25 m/s 2, how long (in seconds) will it take to reach a speed of 550 m/s? (Assume an initial velocity of zero.) A) 22 B) 1.4 × 104 C) 0.045 D) 1.2 × 104 E) 2.3 × 102 Answer: A Diff: 4 Page Ref: Sec. 1.4 47) If an object is accelerating at a rate of 25 m/s2, how fast will it be moving (in m/s) after 1.50 min? (Assume an initial velocity of zero.) A) 17 B) 3.6 C) 38 D) 2.3 × 103 E) 0.060 Answer: D Diff: 4 Page Ref: Sec. 1.4 11 48) A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the object determined to an appropriate number of significant figures? A) 8 × 10-1 g/mL B) 7.9 × 10-1 g/mL C) 7.86 × 10-1 g/mL D) 7.859 × 10-1 g/mL E) 7.8586 × 10-1 g/mL Answer: D Diff: 2 Page Ref: Sec. 1.4, 1.5 49) Expressing a number in scientific notation . A) changes its value B) removes ambiguity as to the significant figures C) removes significant zeros D) allows to increase the number's precision E) all of the above Answer: B Diff: 2 Page Ref: Sec. 1.5 50) The number with the most significant zeros is . A) 0.00002510 B) 0.02500001 C) 250000001 D) 2.501 × 10-7 E) 2.5100000 Answer: C Diff: 1 Page Ref: Sec. 1.5 51) How many significant figures are in the number 0.0034050? A) 3 B) 4 C) 5 D) 6 E) 7 Answer: C Diff: 2 Page Ref: Sec. 1.5 52) How many significant figures should be retained in the result of the following calculation? 12.00000 × 0.9893 + 13.00335 × 0.0107 A) 2 B) 3 C) 4 D) 5 E) 6 Answer: B Diff: 2 Page Ref: Sec. 1.5 12 53) In which one of the following numbers are all of the zeros significant? A) 100.090090 B) 0.143290 C) 0.05843 D) 0.1000 E) 00.0030020 Answer: A Diff: 1 Page Ref: Sec. 1.5 54) Which of the following is not an exact number? A) The number of seconds in a year. B) The number of millimeters in a kilometer. C) The number of liters in a gallon. D) The number of centimeters in an inch. E) The number of grams in a kilogram. Answer: C Diff: 1 Page Ref: Sec. 1.5 55) In which one of the following numbers are none of the zeros significant? A) 100.0 B) 1065 C) 0.0100 D) 1.003450 E) 0.00001 Answer: E Diff: 1 Page Ref: Sec 1.5 56) Round the number 0.007222 to three significant figures. A) 0.007 B) 0.00722 C) 0.0072 D) 0.00723 E) 0.007225 Answer: B Diff: 1 Page Ref: Sec. 1.5 57) Round the number 3456.5 to two significant figures. A) 3400.0 B) 3400 C) 3000 D) 3500 E) 3000.0 Answer: D Diff: 1 Page Ref: Sec. 1.5 13 58) Round the number 0.08535 to two significant figures. A) 0.09 B) 0.086 C) 0.0854 D) 0.085 E) 0.08535 Answer: D Diff: 1 Page Ref: Sec. 1.5 59) One angstrom, symbolized Å, is 10-10 m. 1 cm 3 = Å3 A) 1024 B) 10-24 C) 1030 D) 10-30 E) 10-9 Answer: A Diff: 3 Page Ref: Sec. 1.6 1.2 Bimodal Questions 1) Solids have a shape and are not appreciably . A) definite, compressible B) definite, incompressible C) indefinite, compressible D) indefinite, incompressible E) sharp, convertible Answer: A Diff: 1 Page Ref: Sec. 1.2 2) is the chemical symbol for elemental sodium. A) S B) W C) So D) Na E) Sn Answer: D Diff: 1 Page Ref: Sec. 1.2 3) If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) . A) heterogeneous mixture B) element C) homogeneous mixture D) compound E) mixture of elements Answer: D Diff: 3 Page Ref: Sec. 1.2 14 4) A separation process that depends on differing abilities of substances to form gases is called . A) filtration B) solvation C) distillation D) chromatography E) All of the above are correct. Answer: C Diff: 3 Page Ref: Sec. 1.3 5) The initial or tentative explanation of an observation is called a(n) . A) law B) theory C) hypothesis D) experiment E) test Answer: C Diff: 2 Page Ref: Sec. 1.4 6) A concise verbal statement or mathematical equation that summarizes a broad variety of observations and experiences is called a(n) . A) law B) theory C) hypothesis D) experiment E) test Answer: A Diff: 2 Page Ref: Sec. 1.4 7) The SI unit for mass is . A) kilogram B) gram C) pound D) troy ounce E) none of the above Answer: A Diff: 1 Page Ref: Sec. 1.4 8) A one degree of temperature difference is the smallest on the temperature scale. A) Kelvin B) Celsius C) Fahrenheit D) Kelvin and Celsius E) Fahrenheit and Celsius Answer: C Diff: 3 Page Ref: Sec. 1.4 15 9) is the abbreviation for the prefix mega -. A) k B) m C) M D) n E) d Answer: C Diff: 1 Page Ref: Sec. 1.4 10) Milli is the abbreviation for the prefix . A) k B) m C) M D) n E) d Answer: B Diff: 1 Page Ref: Sec. 1.4 11) A common English set of units for expressing velocity is miles/hour. The SI unit for velocity is . A) km/hr B) km/s C) m/hr D) m/s E) cm/s Answer: D Diff: 3 Page Ref: Sec. 1.4 12) The density of a gold nugget is 19.3 g/cm 3. If the volume of the gold nugget is 0.00369 L, the mass of the nugget is . A) 71.2 B) 0.191 C) 19.3 D) 5.23 E) none of the above Answer: A Diff: 2 Page Ref: Sec. 1.4 13) The length of the side of a cube having a density of 12.6 g/ml and a mass of 7.65 g is cm. A) 3.20 B) 0.847 C) 1.02 D) 0.584 E) 1.32 Answer: B Diff: 4 Page Ref: Sec. 1.4 14) The unit of force in the English measurement system is which is in base SI units. lb ft . The SI unit of force is the Newton, s2