Chemistry: The Central Science , 12th Edition Test Bank

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TESTITEMFILEAaron SkelhorneMacEwan UniversityAlen HadzovicUniversity of TorontoChemistry:A Molecular ApproachFirst Canadian EditionNivaldo J. TroWestmount CollegeTravis FridgenMemorial University of NewfoundlandLawton E. ShawAthabasca UniversityWith contributions byRobert S. BoikessRutgers University

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical ChangeChapter 1Units of Measurement for Physical and Chemical ChangeMultiple Choice Questions1) Which of the following is an example of physical change?A) Sugar is dissolved in water.B) Tea is brewed.C) Dry ice sublimes.D) Ice (solid water) melts.E) All of the above are examples of physical change.Answer: EDiff: 1Type: MCVar: 1Page Ref: 1.12) Which of the following is an example of physical change?A) Dew forms on a blade of grass.B) A Halloween light stick glows after shaking.C) An egg solidifies during cooking.D) A hydrogen balloon explodes when contacted with a flame.E) None of the above is a physical change.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.13) Which of the following is an example of a chemical change?A) Copper building materials develop a green patina over time.B) A match burns.C) Ethanol evaporates.D) Both A and B are examples of chemical change.E) All of the above are examples of chemical change.Answer: DDiff: 1Type: MCVar: 1Page Ref: 1.14) Which of the following is an example of a chemical change?A) tea brewingB) water boilingC) leaves turning colour in the fallD) salt dissolving in waterE) None of the above is a chemical change.Answer: CDiff: 1Type: MCVar: 1Page Ref: 1.1

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change5) A physical changeA) occurs when iron rusts.B) occurs when sugar is heated into caramel.C) occurs when glucose is converted into energy within your cells.D) occurs when water is evaporated.E) occurs when propane is burned for heat.Answer: DDiff: 1Type: MCVar: 1Page Ref: 1.16) A chemical changeA) occurs when methane gas is burned.B) occurs when paper is shredded.C) occurs when water is vaporized.D) occurs when salt is dissolved in water.E) occurs when powdered lemonade is stirred into water.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.17) Which of the following represents a physical property?A) Sodium metal is extremely reactive with chlorine gas.B) Mercury is a silvery liquid at room temperature.C) Aluminum has a tendency to "rust."D) Butane is highly flammable.E) Argon has an unreactive nature.Answer: BDiff: 1Type: MCVar: 1Page Ref: 1.18) Which of the following represents a chemical property of hydrogen gas?A) It is gaseous at room temperature.B) It is less dense than air.C) It reacts explosively with oxygen.D) It is colourless.E) It is tasteless.Answer: CDiff: 1Type: MCVar: 1Page Ref: 1.19) Define thermal energy.A) energy associated with the temperature of an objectB) energy associated with the motion of an objectC) energy associated with the force of an objectD) energy associated with the gravity of an objectAnswer: ADiff: 1Type: MCVar: 1Page Ref: 1.2

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change10) Which of the following is an SI base unit?A) voltB) gramC) hourD) kelvinE) dozenAnswer: DDiff: 1Type: MCVar: 1Page Ref: 1.311) Identify the unit of measurement that is a SI base unit of measurement.A) secondB) CelsiusC) cupD) poundE) yardAnswer: ADiff: 1Type: MCVar: 1Page Ref: 1.312) Kilogram is a measure ofA) mass.B) time.C) temperature.D) length.E) volume.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.313) Metre is a measure ofA) mass.B) time.C) temperature.D) length.E) volume.Answer: DDiff: 1Type: MCVar: 1Page Ref: 1.314) Kelvin is a measure ofA) mass.B) time.C) temperature.D) length.E) volume.Answer: CDiff: 1Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change15) Second is a measure ofA) mass.B) time.C) temperature.D) length.E) volume.Answer: BDiff: 1Type: MCVar: 1Page Ref: 1.316) Mole is a measure ofA) luminous intensity.B) amount.C) mass.D) length.E) current.Answer: BDiff: 1Type: MCVar: 1Page Ref: 1.317) Ampere is a measure ofA) luminous intensity.B) amount.C) mass.D) length.E) current.Answer: EDiff: 1Type: MCVar: 1Page Ref: 1.318) Which of the following is an example of intensive properties?A) densityB) volumeC) massD) None of the above is an example of intensive properties.E) All of the above are examples of intensive properties.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.319) Which of the following is an example of extensive properties?A) massB) colourC) densityD) temperatureE) tasteAnswer: ADiff: 1Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change20) Identify the common substance that has the highest density.A) sugarB) waterC) glassD) leadE) aluminumAnswer: DDiff: 1Type: MCVar: 1Page Ref: 1.321) Identify the common substance that has the lowest density.A) iceB) aluminumC) copperD) table saltE) sugarAnswer: ADiff: 1Type: MCVar: 1Page Ref: 1.322) If the temperature is 178 °F, what is the temperature in degrees Celsius?A) 352 °CB) 451 °CC) 67 °CD) 81.1 °CE) 378 °CAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.323) How many ns are in 16 ms?A) 1.6 × 10-2 nsB) 1.6 × 107 nsC) 1.6 × 10-5 nsD) 1.6 × 105 nsE) 1.6 × 102 nsAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.324) How many dm are in 345 dam?A) 0.345 dmB) 3.45 dmC) 3450 dmD) 34500 dmE) 345000 dmAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change25) Convert 514 nm to m and express it in scientific notation.A) 514 × 10-5 mB) 5.14 × 10-7 mC) 51.4 × 10-7 mD) 5.14 × 1011 mE) 5.14 × 10-9 mAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.326) Convert 12.5 μL to L and express it in scientific notation.A) 1.25 × 105 LB) 1.25 × 107 LC) 1.25 × 10-3 LD) 1.25 × 10-7 LE) 1.25 × 10-5 LAnswer: EDiff: 2Type: MCVar: 1Page Ref: 1.327) Convert 8.3 mg to μg.A) 0.0083 μgB) 83 μgC) 830 μgD) 8300 μgE) 83000 μgAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.328) Convert 46.9 GHz to THz.A) 0.0469 THzB) 46900 THzC) 0.469 THzD) 4690 THzE) 0.000469 THzAnswer: ADiff: 2Type: MCVar: 1Page Ref: 1.329) If the speed limit on a highway is 100 km h-1, what is the speed limit in m h-1?A) 1 × 107 m h-1B) 0.1 m h-1C) 1 × 103 m h-1D) 1 × 105 m h-1E) 1 × 101 m h-1Answer: DDiff: 2Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change30) Convert 3000 m h-1 to km h-1.A) 3 km h-1B) 0.3 km h-1C) 30 km h-1D) 300 km h-1E) 0.03 km h-1Answer: ADiff: 2Type: MCVar: 1Page Ref: 1.331) Convert 1.34 km2 to m2.A) 1340000 m2B) 134000 m2C) 1.34 × 107 m2D) 1.34 × 104 m2E) 1340 m2Answer: ADiff: 2Type: MCVar: 1Page Ref: 1.332) Convert 4392 m3 to hm3.A) 4.392 × 10-5 hm3B) 4.392 × 10-3 hm3C) 4.392 × 10-1 hm3D) 4.392 × 101 hm3E) 4.392 × 102 hm3Answer: BDiff: 2Type: MCVar: 1Page Ref: 1.333) If a solution has a temperature of 355 K, what is its temperature in degrees Celsius?A) 165 °CB) 628 °CC) 179 °CD) 279 °CE) 82 °CAnswer: EDiff: 2Type: MCVar: 1Page Ref: 1.334) If the outside temperature is 35 °C, what is the temperature in K?A) -238 KB) 308 KC) 95 KD) 31 KE) 63 KAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change35) Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water whenplaced in a graduated cylinder.A) 8.08 g mL-1B) 1.38 g mL-1C) 12 .4 g mL-1D) 18.1 g mL-1E) 11.4 g mL-1Answer: CDiff: 2Type: MCVar: 1Page Ref: 1.336) Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g cm-1.A) 87.9 mLB) 42 .4 mLC) 18.5 mLD) 23.6 mLE) 31.2 mLAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.337) Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g mL-1.A) 298 gB) 1100 gC) 907 gD) 568 gE) 866 gAnswer: EDiff: 2Type: MCVar: 1Page Ref: 1.338) If the outside air temperature is 30 °F, what is the temperature in kelvin?A) 303 KB) 307 KC) 274 KD) 272 KAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.339) If the outside temperature is 35 °C, what is the temperature in °F?A) 95 °FB) 31 °FC) 121 °FD) 5.4 °FE) 63 °FAnswer: ADiff: 2Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change40) A solution has a temperature of 68 °C. What is the temperature in K?A) 427 KB) 20 KC) 154 KD) 341 KE) 296 KAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.341) A solution has a temperature of 18.65 °C. What is the temperature in K?A) 324.80 KB) 291.80 KC) 301.65 KD) 65.57 KE) 283.15 KAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.342) A gas phase mixture has a temperature of 643 °C. Calculate the temperature in K.A) 916 KB) 873 KC) 188 KD) 1391 KE) 370 KAnswer: ADiff: 2Type: MCVar: 1Page Ref: 1.343) An unknown metal is heated to 850 °F. What is the temperature in K?A) 1350 KB) 1120 KC) 460 KD) 540 KE) 730 KAnswer: EDiff: 2Type: MCVar: 1Page Ref: 1.344) The melting point of copper is 1984 °F. What is the melting point in K?A) 1724 KB) 1631 KC) 1358 KD) 2257 KE) 1286 KAnswer: CDiff: 2Type: MCVar: 1Page Ref: 1.3

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change45) Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its lowfreezing point, 8.6 °F. What is the freezing point in K?A) 280 KB) -13 KC) 260 KD) 273 KE) 240 KAnswer: CDiff: 2Type: MCVar: 1Page Ref: 1.346) Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its lowfreezing point, 8.6 °F. What is the freezing point in °C?A) 0.0°CB) -13°CC) -26°CD) -45°CE) -54°CAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.347) Ethanol has a boiling point of 351 K. What is the boiling point in °C?A) 78 °CB) -195 °CC) 122 °CD) 62 °CE) 86 °CAnswer: ADiff: 2Type: MCVar: 1Page Ref: 1.348) Ethanol has a freezing point of 159 K. What is the freezing point in °C?A) -81 °CB) -78 °CC) -62 °CD) -114 °CE) -195 °CAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.349) A student performs an experiment to determine the density of a sugar solution. She obtains thefollowing results: 1.11 g mL-1, 1.81 g mL-1, 1.95 g mL-1, 1.75 g mL-1. If the actual value for the density ofthe sugar solution is 1.75 g mL-1, which statement below best describes her results?A) Her results are precise, but not accurate.B) Her results are accurate, but not precise.C) Her results are both precise and accurateD) Her results are neither precise nor accurate.E) It isn't possible to determine from the information given.Answer: DDiff: 1Type: MCVar: 1Page Ref: 1.4

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change50) A student performs an experiment to determine the density of a sugar solution. She obtains thefollowing results: 1.71 g mL-1, 1.73 g mL-1, 1.67 g mL-1, 1.69 g mL-1. If the actual value for the density ofthe sugar solution is 1.40 g mL-1, which statement below best describes her results?A) Her results are precise, but not accurate.B) Her results are accurate, but not precise.C) Her results are both precise and accurateD) Her results are neither precise nor accurate.E) It isn't possible to determine from the information given.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.451) A student performs an experiment to determine the density of a sugar solution. She obtains thefollowing results: 1.79 g mL-1, 1.81 g mL-1, 1.80 g mL-1, 1.81 g mL-1. If the actual value for the density ofthe sugar solution is 1.80 g mL-1, which statement below best describes her results?A) Her results are precise, but not accurate.B) Her results are accurate, but not precise.C) Her results are both precise and accurateD) Her results are neither precise nor accurate.E) It isn't possible to determine from the information given.Answer: CDiff: 1Type: MCVar: 1Page Ref: 1.452) Systematic error is defined asA) error that tends to be consistently too high or too low.B) error that has equal probability of being too high or too low.C) error that averages out with repeated trials.D) error that is random.Answer: ADiff: 1Type: MCVar: 1Page Ref: 1.4

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change53) Read the water level with the correct number of significant figures.A) 5 mLB) 5.3 mLC) 5.32 mLD) 5.320 mLE) 5.3200 mLAnswer: BDiff: 2Type: MCVar: 1Page Ref: 1.4

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change54) Read the temperature with the correct number of significant figures.A) 87 °CB) 87.2 °CC) 87.20 °CD) 87.200 °CE) 87.2000 °CAnswer: CDiff: 2Type: MCVar: 1Page Ref: 1.455) Read the length of the metal bar with the correct number of significant figures.A) 20 cmB) 15 cmC) 15.0 cmD) 15.00 cmE) 15.000 cmAnswer: CDiff: 2Type: MCVar: 1Page Ref: 1.4

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Chemistry: A Molecular Approach,1ceChapter 1: Units of Measurement for Physical and Chemical Change56) Read the length of the metal bar with the correct number of significant figures.A) 20 cmB) 15 cmC) 15.0 cmD) 15.00 cmE) 15.000 cmAnswer: DDiff: 2Type: MCVar: 1Page Ref: 1.457) How many significant figures are in 1009.630 mL?A) 3B) 4C) 5D) 6E) 7Answer: EDiff: 2Type: MCVar: 1Page Ref: 1.458) How many significant figures are in 3.408 × 104 m?A) 3B) 4C) 5D) 7E) 8Answer: BDiff: 2Type: MCVar: 1Page Ref: 1.4

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