Exam 1 Spring 2010

1 mg what volume of a piece of steel has a mass of

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Unformatted text preview: e of a piece of steel has a mass of 535 g. The density of the steel is 7.91 g/cm3. A. C. 14.8 cm3 B. 8. 4230 cm3 42.3 cm3 D. 67.6 cm3 If a baby crawls 1224 cm in 2.0 minutes, what is the baby’s crawling speed in in/s? A. B. 9. 4.0 in/s 6.9 10–5 in/s C. D. 4.8 102 in/s 10. in/s What is the mass of air, in grams, in a room that is 10.0 ft by 12.5 ft by 15.0 ft? The density of air at the temperature of the room is 1.19 g/L. (V = l w h; 1 ft = 12 in) A. 10 4 g C. 57.2 g B. 10. 6.32 1.87 1011 g D. 3.77 An ore of copper contains 41.23 percent Cu by mass. How many grams of Cu can be obtained from 3.62 102 kg of the ore? A. B. 11. 1011 g 1.49 105 g 0.149 g C. D. 2.35 103 g 0.235 g How many neutrons are in a platinum isotope that has a mass number of 195? A. 113 C. 149 B. 134 D. 117 12. The at...
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