Chemistry Section Review 2.2
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1 Chemistry Section Review 2.2 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Standards of measurement are chosen because they a. can be related to everyday objects. b. are reproducible in another laboratory. c. cannot be destroyed by any common physical or chemical means. d. are easily changed. 2. Which of these statements does not describe a measurement standard? a. Measurement standards avoid ambiguity. b. Measurement standards must be unchanging. c. A standard can be easily changed to suit the experiment. d. Confusion is eliminated when the correct measurement is applied. 3. All of the following are examples of units except a. mass. c. gram. b. kilometer. d. ounce. 4. Which of these is not an SI base unit? a. kilogram c. liter b. second d. Kelvin 5. The SI base units for length and time are a. centimeter and second. c. centimeter and hour. b. meter and hour. d. meter and second. 6. The metric unit for length that is closest to the diameter of a pencil is the a. micrometer. c. centimeter. b. millimeter. d. decimeter. 7. The symbol mm represents a. micrometer. c. milliliter. b. millimeter. d. meter. 8. The symbols for units of length in order from largest to smallest are a. m, cm, mm, km. c. km, mm, cm, m. b. mm, m, cm, km. d. km, m, cm, mm. 9. Which of these metric units is used to measure mass? a. m c. g b. mm d. L 10. The quantity of matter per unit volume is a. mass. c. inertia. b. weight. d. density. 11. The unit m 3 measures a. length. c. volume. b. area. d. time.
2 12. The liter is defined as a m 3. c g 3. b cm 3. d c The standard base unit for mass is the a. gram. c. meter. b. cubic centimeter. d. kilogram. 14. A volume of 1 milliliter is equivalent to a. 1 cubic centimeter. c. 1 liter. b. 1 gram. d cubic decimeters. 15. Which of these symbols represents a unit of volume? a. ml c. mm b. mg d. cm 16. The SI base unit for time is the a. day. c. minute. b. hour. d. second. 17. Which of these is the abbreviation for the SI base unit of time? a. hr c. sec b. h d. s 18. The most appropriate SI unit for measuring the length of an automobile is the a. millimeter. c. meter. b. kilometer. d. liter. 19. The SI base unit for length is the a. meter. c. centimeter. b. millimeter. d. kilometer. 20. All of the following are SI units for density except a. kg/m 3. c. g/cm 3. b. kg/l. d. g/m A change in the force of gravity on an object will affect its a. mass. c. weight. b. density. d. kinetic energy. 22. Which of these is a measure of Earth's gravitational pull on matter? a. density c. volume b. weight d. mass 23. Which of these is a measure of the amount of material? a. density c. volume b. weight d. mass 24. Which of these statements about mass is true? a. Mass is expressed in pounds or newtons. b. Mass is usually measured with a spring scale. c. The mass of an object depends on the force of gravity acting on it. d. The mass of an object is determined by comparing it to an object of known mass.
3 25. Which pair of quantities determines the density of a material? a. mass and weight c. volume and concentration b. volume and weight d. volume and mass 26. The relationship between the mass m of a material, its volume V, and its density D is a. D = mv. c. D = m/v. b. D = V/m. d. D = m + v. 27. The density of an object is calculated by a. multiplying its mass times its volume. b. dividing its mass by its volume. c. dividing its volume by its mass. d. adding its mass to its volume. 28. When density is measured, a. a graduated cylinder is always used. b. the units are always kg/m 3. c. the temperature should be specified. d. the material must be a pure substance. 29. Which of these statements about density is true? a. Larger objects are more dense. b. Density does not depend on temperature. c. Density is a physical property. d. The density of an object depends on the force of gravity. 30. The density of aluminum is 2.70 g/cm 3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm 3? a g c g b g d g 31. A sample of gold has a mass of 96.5 g and a volume of 5.00 cm 3. The density of gold is a g/cm 3. c g/cm 3. b g/cm 3. d. 483 g/cm The density of pure diamond is 3.5 g/cm 3. What is the volume of a diamond with a mass of 0.25 g? a cm 3 c cm 3 b cm 3 d. 14 cm g is equivalent to a. 250 kg. c mg. b. 250 mg. d kg cm is the same as a m. c m. b mm. d. 0.5 mm L of water is equivalent to a ml. c. 106 ml. b ml. d ml. 36. The number of grams equal to 0.5 kg is a c b d
4 Short Answer 37. Show how SI units for volume and density are derived from SI base units for length and mass. 38. Identify two prefixes that can be added to an SI base unit to change its magnitude. For each prefix, tell how the magnitude changes (e.g., 10 times greater, 1000 times smaller, etc.). 39. Distinguish between mass and weight. Essay 40. The table below show measurements made on samples of three unknown materials. Explain how this data could be used to identify the three materials. Mass and Volume Data Material Mass (g) Volume (ml)
5 Chemistry Section Review 2.2 Answer Section MULTIPLE CHOICE 1. B 2. C 3. A 4. C 5. D 6. C 7. B 8. D 9. C 10. D 11. C 12. B 13. D 14. A 15. A 16. D 17. D 18. C 19. A 20. D 21. C 22. B 23. D 24. D 25. D 26. C 27. B 28. C 29. C 30. C 31. B 32. A 33. B 34. D 35. D 36. C SHORT ANSWER 37. V = m 3 or any correct conversion of meters cubed to a volume unit AND
6 d = kg/m 3 or any correct conversion of kilograms divided by meters cubed to a density unit. 38. The prefix k changes magnitude by a factor of The prefix c changes magnitude by a factor of (Accept any correct pair of prefixes.) 39. Mass is the amount of matter in something. OR Mass is a measure of an object s inertia. Weight is a measure of the gravitational pull on an object. ESSAY 40. The density of each sample could be calculated. Then each value could be compared to known values to identify the substances.
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