Ch 12 Questions

# Ch 12 Questions - AP Ch 12 Quiz Multiple Choice Identify...

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AP Ch 12 Quiz Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Rank the following pressures in increasing order of magnitude: 623 mm Hg, 133 kPa, 0.155 atm, and 0.500 bar. a. 0.500 bar < 623 mm Hg < 133 kPa < 0.155 atm b. 0.155 atm < 0.500 bar < 623 mm Hg < 133 kPa c. 0.155 atm < 623 mm Hg < 0.500 bar < 133 kPa d. 623 mm Hg < 0.500 bar < 133 kPa < 0.155 atm e. 133 kPa < 0.155 atm < 0.500 bar < 623 mm Hg ____ 2. At 0.984 atm, the height of mercury in a barometer is 74.8 cm. If the mercury were replaced with water, what height of water (in centimeters) would be supported at this pressure? The densities of Hg and H 2 O are 13.5 g/cm 3 and 1.00 g/cm 3 , respectively. a. 5.54 cm b. 13.3 cm c. 994 cm d. 1.01 × 10 3 cm e. 1.84 × 10 5 cm ____ 3. If the volume of a confined gas is quadrupled while its temperature remains constant, what change will be observed? a. The pressure of the gas will decrease to 1/4 its original value. b. The pressure of the gas will quadruple. c. The density of the gas will decrease to 1/2 its original value. d. The average velocity of the molecules will quadruple. e. The average velocity of the molecules will double. ____ 4. A tightly sealed 5.0-L flask contains 781 mm Hg of Ar at 19 ° C. The flask is heated until the pressure is doubled. What is the temperature of the gas? a. -127 ° C b. 38 ° C c. 95 ° C d. 149 ° C e. 311 ° C ____ 5. A 0.225-L flask contains CH 4 at 27 ° C and 318 mm Hg. What is the pressure of the CH 4 if the volume is increased to 0.500 L and the temperature increased to 95 ° C? a. 117 mm Hg b. 176 mm Hg c. 503 mm Hg d. 508 mm Hg e. 867 mm Hg

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____ 6. Avogadro's hypothesis states that equal volumes of gases under the same conditions of temperature and pressure have equal ____. a.
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Ch 12 Questions - AP Ch 12 Quiz Multiple Choice Identify...

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