1 CH 304K Practice Problems Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. How many millimeters are there in 25 feet? a. 7.6 10 2 mm b. 2.6 10 3 mm c. 1.0 10 2 mm d. 7.6 10 3 mm e. 1.2 10 3 mm 2. What is the height in centimeters of a person who is 6 feet 10 inches tall? a. 2.0 10 4 cm b. 2.1 10-1 cm c. 5.3 10 3 cm d. 2.1 10 2 cm e. 3.3 10 2 cm 3. Express 39.34 square yards in square centimeters. a. 0.6417 cm 2 b. 17280 cm 2 c. 1.835 10 6 cm 2 d. 3.289 10 5 cm 2 e. 7.632 10 6 cm 2 4. What is 16.7 cubic feet expressed in cubic centimeters? a. 1.55 10 4 cm 3 b. 510 cm 3 c. 0.159 cm 3 d. 1.76 10 3 cm 3 e. 4.73 10 5 cm 3 5. If an airplane's speed is 850 mi/h, what is its speed in m/s? a. 40 m/s b. 1360 m/s c. 380 m/s d. 528 m/s e. 4.0 10 5 m/s 6. On the planet Xgnu, the most common units of length are the bilm (for long distance) and the kryll (for Two cities on Xgnu are 36.2 blim apart. What is this distance in kryll? a. 2.55 x 10 4 kryll d. 9.63 x 10 5 kryll b. 1.00 x 10 3 kryll e. 4.54 x 10 6 kryll c. 5.07 x 10 4 kryll 7. On the planet Xgnu, the most common units of length are the bilm (for long distance) and the kryll (for The average Xgnunese is 170 kryll tall. What is this height in blims? a. 0.12 blim d. 0.88 blim b. 1.45 blim e. 5.00 blim c. 12.0 blim
2 8. On the planet Xgnu, the most common units of length are the bilm (for long distance) and the kryll (for The chemistry book at the Xgnu University has an area of 72.5 square krylls. What is the area of the book in square blims. a. 0.355 blim 2 d. 65.3 blim 2 b. 6.60 x 10-3 blim 2 e. 3.70 x 10-5 blim 2 c. 7.01 x 10-6 blim 2 9. Suppose your car is rated at 45 miles per gallon highway use and 38 miles per gallon for city driving. If you wanted to write your friend in Spain about your car s mileage, what rating for highway mileage in kilometers per liter would you report? (1 gallon = 4 quarts; 1 liter = 1.0567 quarts; 1 mile = 1.6093 km) a. 62 km/l d. 19 km/l b. 8.0 km/l e. 15 km/l c. 76 km/l 10. The distance 10.5 cm could also be expressed as _m. a. 0.105 m d. 100.5 m b. 10.5 m e. 10500m c. 0.0105 m 11. The length 100 mm can also be expressed as _cm. a. 0.1 cm d. 0.001 cm b. 0.01 cm e. 1000 cm c. 10 cm 12. The planet Jupiter is about 4.0 x 10 8 mi from Earth. If radio signals travel at the speed of light, which is 3.0 x 10 10 cm/s, how long would it take ( in hours) a radio command from Earth to reach a spacecraft passing Jupiter? a. 0.58 hr d. 0.29 hr b. 5.8 hr e. 2.9 hr c. 58 hr 13. Which of the following samples has the smallest volume? a. 2.3 x 10 2 ml c. 2.3 x 10 2 ml b. 2.3 x 10 2 L d. 2.3 x 10 2 kl 14. The mass 1.786 kg can also be expressed as _mg. a. 1.786 x 10 6 mg d. 1.786 x 10 9 mg b. 1.786 x 10 3 mg e. 1.786 x 10 12 mg c. 1.786 x 10-9 mg 15. Convert 65 cm 3 to km 3. a. 6.5 x 10-14 km 3 d. 6.5 x 10-10 km 3 b. 6.5 x 10-12 km 3 e. 6.5 x 10-6 km 3 c. 6.5 x 10-11 km 3 16. Convert 20.0 cubic yards to cubic meters. (1.0 yd = 3 ft; 1.0 in = 2.54 cm; 1.0 ft = 12 in) a. 6.02 m 3 d. 0.425 m 3 b. 2.37 m 3 e. 98.6 m 3 c. 15.3 m 3 17. How many times more expensive is buying a carbonated beverage in 12-oz cans at forty cents each relative to buying it in three-liter bottles at $1.49 each? (1.0 L = 1.057 qts; 1.0 qt = 32 oz) a. 1.33 d. 2.89 b. 2.27 e. 3.72 c. 2.54
3 18. Zinc has a density of 446 lb/ft 3. What is the density of zinc in g/cm 3? (1 lb = 453.59 g; 1.0 in = 2.54 cm) a. 7.14 g/cm 3 c. 6.64 x 10 3 g/cm 3 b. 0.0323 g/cm 3 d. 3.65 g/cm 3 19. Alcohol has a density of 0.78 g/ml. How many grams of alcohol would it take to fill a 2 fluid ounce shot glass? (1 qt = 32 fluid ounces: 1 liter = 1.0567 qt) a. 59 g d. 122 g b. 368 g e. 0.053 g c. 46 g 20. The density of Mg is 1.74 g/cm 3. What is the mass of a Mg block that measures 2.5 cm 3.5 cm 1.5 cm? a. 48 g c. 12 g b. 23 g d. 7.5 g 21. There are exactkt 32 ounces in a quart. How many cubic inches are in 1.0 ounce? 1 quart = 0.946 liter) a. 12 in 3 c. 1.8 x 10 3 in 3 b. 4.8 x 10 2 in 3 d. 1.8 in 3 22. The output of a production plant is 4335 pounds of ball bearings per week (5 days). If each ball bearing weighs 0.0113 g, how may ball bearings does the production plant make in a single day? (1.0 lb = 453.59 g) a. 3.84 x 10 5 d. 3.48 x 10 7 b. 7.67 x 10 4 e. 2.91 x 10 6 c. 867 23. Below is a list of common prefixes used in the SI and metric systems. Included with each is an abbreviation and meaning. Which set contains an error? a. mega- M 10-6 b. deci- d 10-1 c. nano- n 10-9 d. milli- m 10-3 e. kilo- k 10 3 24. What is the area in square millimeters of a rectangle that is 8.632 cm long and 26.41 mm wide? a. 2280 mm 2 b. 3.060 mm 2 c. 22.80 mm 2 d. 0.3060 mm 2 e. 30.60 mm 2 25. What is the area (in mm 2 ) of a rectangular surface that is 0.640 inch wide and 1.14 inches long? a. 471 mm 2 b. 328 mm 2 c. 84.2 mm 2 d. 242 mm 2 e. 680 mm 2 26. The density of mercury is 13.6 g/cm 3. What is the mass of 6.50 cm 3 of mercury? a. 0.478 g b. 88.4 g c. 18.9 g d. 2.38 g e. 1.10 10 2 g 27. A gold ring has a mass of 15.37 g. If this ring is pure gold (density = 16.1g/mL), what would the volume of the ring be? a. 15.37 ml b. 1.04 ml
4 c. 0.955 ml d. 16.1 ml e. 8.05 ml 28. The density of octane is 0.702 g/cm 3. What is the mass of 65.0 ml of octane? a. 110 g b. 92.6 g c. 22.5 g d. 45.6 g e. 1.08 10-2 g 29. Convert 1.57 g to kg, cg, and mg. a. 1570 kg, 0.0157 cg, 0.00157 mg b. 0.00157 kg, 0.0157 cg, 1570 mg c. 0.00157 kg, 157 cg, 1570 mg d. 157 kg, 1570 cg, 0.00157 mg e. 1570 kg, 0.00157 cg, 157 mg
5 CH 304K Practice Problems Answer Section MULTIPLE CHOICE 1. ANS: D TOP: The Unit Factor Method (Dimensional Analysis) 2. ANS: D TOP: The Unit Factor Method (Dimensional Analysis) 3. ANS: D TOP: The Unit Factor Method (Dimensional Analysis) 4. ANS: E TOP: The Unit Factor Method (Dimensional Analysis) 5. ANS: C TOP: The Unit Factor Method (Dimensional Analysis) 6. ANS: C 7. ANS: A 8. ANS: E 9. ANS: D 10. ANS: A 11. ANS: C 12. ANS: A 13. ANS: C 14. ANS: D 15. ANS: A 16. ANS: C 17. ANS: B 18. ANS: A 19. ANS: C 20. ANS: B 21. ANS: D 22. ANS: D 23. ANS: A TOP: Measurements in Chemistry 24. ANS: A TOP: The Unit Factor Method (Dimensional Analysis) 25. ANS: A TOP: The Unit Factor Method (Dimensional Analysis) 26. ANS: C TOP: The Unit Factor Method (Dimensional Analysis) 27. ANS: B TOP: Density and Specific Gravity 28. ANS: C TOP: Density and Specific Gravity 29. ANS: D TOP: Density and Specific Gravity 30. ANS: C OBJ: Goal 3-6