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Chemistry The Molecular Nature of Matter and Change, 2nd Canadian Edition, Martin Silberberg, Sophie Lavieri ,Rashmi Venkateswaran

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil ( d = 1.75 g/cm 3 ). What is the density of talc? 1) A) 1.61 g/cm 3 B) 2.82 g/cm 3 C) 2.63 g/cm 3 D) 2.44 g/cm 3 E) 4.61 g/cm 3 2) A dictionary has the following definition for a word: "a tentative explanation that accounts for a set of facts." Which of the following words best fits that definition? 2) A) hypothesis B) theory C) experiment D) law E) definition 3) The area of a 3.80 dm diameter pizza is 11.3 dm 2 . Express this area in square centimeters. 3) A) 113 cm 2 B) 11300 cm 2 C) 113000 cm 2 D) 1.13 cm 2 E) 1130 cm 2 4) Select the best statement. 4) A) Chemical changes are easily reversed by altering the temperature of the system. B) Chemical changes are associated primarily with extensive properties. C) Chemical changes always produce substances different from the starting materials. D) Chemical changes are accompanied by changes in the total mass of the substances involved. E) Chemical changes provide the only valid basis for identification of a substance. 1 Chapter 1 2 / 4

5) The result of (3.8621 × 1.5630) - 5.98 is properly written as 5) A) 0.0565. B) 0.056462. C) 0.06. D) 0.05646. E) 0.056. 6) A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters? 6) A) 3.5 × 10 -4 cL B) 3.5 cL C) 3.5 × 10 4 cL D) 3.5 × 10 -3 cL E) 3.5 × 10 5 cL 7) The S.I. prefix mega- (M) means 7) A) 10 6 . B) 10 9 . C) 10 -6 . D) 10 -3 . E) 10 3 . 8) Which of the following is not an S.I. base unit? 8) A) second B) ampere C) Meter D) Kelvin E) gram 9) Express 96,342 m using 2 significant figures. 9) A) 9.60 × 10 4 m B) 9.6 × 10 4 m C) 9.60 × 10 -4 m D) 96000 m E) 9.6 × 10 -4 m 10) In an average year the American chemical industry produces more than 9.5 million metric tons of sodium carbonate. Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals. How many kilograms of sodium carbonate are produced annually? 10) A) 9.5 × 10 12 kg B) 9.5 × 10 9 kg C) 9.5 × 10 15 kg D) 9.5 × 10 3 kg E) 9.5 × 10 6 kg 11) Which of the following correctly expresses 52,030.2 m in scientific notation? 11) A) 5.20302 × 10 4 m B) 5.20 × 10 4 m C) 5.2 × 10 4 m D) 5.203 × 10 4 m E) 5.20302 × 10 5 m 2 3 / 4

12) The average distance from Earth to the Sun is 150 megameters. What is that distance in meters? 12) A) 1.5 × 10 3 m B) 1.5 × 10 -6 m C) 1.5 × 10 6 m D) 1.5 × 10 8 m E) 1.5 × 10 5 m 13) The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms? 13) A) 5.5 × 10 5 kg B) 5.5 × 10 -1 kg C) 5.5 × 10 -4 kg D) 5.5 × 10 -6 kg E) 5.5 × 10 8 kg 14) The S.I. unit of speed (velocity) is 14) A) m/s. B) km/s. C) m/h. D) km/h. E) none of the other choices. 15) Which of the following is a chemical change? 15) A) condensing water vapor into rainfall B) broiling a steak on a grill C) melting wax D) carving a piece of wood E) boiling of water 16) Select the best statement about chemistry before 1800. 16) A) Lavoisier's quantitative work on the role of oxygen in combustion was the beginning of modern chemistry. B) Alchemists failed because they did not develop any practical chemical methods. C) The interpretation of data by alchemists was not biased by their overall view of life. D) Alchemy focused on objective experimentation rather than mystical explanations of processes. E) The phlogiston theory laid a valuable theoretical basis for modern chemistry. 17) Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas ® , boils at 56.1 C. What is the boiling point in kelvins? 17) A) 298.2 K B) -217.0 K C) 56.1 K D) 462.4 K E) 329.2 K 3

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