W_06+-+practice+exam+2a

# W_06+-+practice+exam+2a - MULTIPLE CHOICE. Choose the one...

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1 MULTIPLE CHOICE. Choose the one alternative that BEST completes the statement or answers the question. 1. Equal volumes of nitrogen and carbon monoxide at the same temperature and pressure have the same 1. density. 2. number of molecules. 3. number of atoms. [A] 3 only [B] 2 only [C] 2 and 3 only [D] 1, 2, and 3 [E] 1 only 2. The valve between the 2.00-L bulb, in which the gas pressure is 1.00 atm, and the 3.00-L bulb, in which the gas pressure is 1.50 atm, is opened. What is the final pressure in the two bulbs, the temperature being constant and the same in both bulbs? [A] 0.900 atm [B] 1.25 atm [C] 1.30 atm [D] 2.25 atm [E] 2.50 atm 3. The volume of a sample of gas measured at 25.0 ° C and 1.00 atm pressure is 10.0 L. What must the final temperature be in order for the gas to have a final volume of 7.5 L at 1.00 atm pressure? [A] 35 ° C [B] 19 ° C [C] 50. ° C [D] 45 ° C [E] 55 ° C

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2 4. For a gas, which two variables are DIRECTLY proportional to each other (if all other conditions remain constant)? 1. P and V 2. P and n 3. P and T [A] 1 and 2 only [B] 1 only [C] 2 only [D] 3 only [E] 2 and 3 only 5. An empty 2.0 L soda bottle is tightly capped at 22 ° C and 650 mmHg. If the bottle is placed in water at 95 ° C, what is the pressure in the bottle? [A] 2800 mmHg [B] 810 mmHg [C] 930 mmHg [D] 520 mmHg [E] 780 mmHg 6. At standard conditions, it was found that 1.50 L of a gas weighed 4.75 g. The gas is [A] HNF 2 [B] NH 3 [C] NO 2 [D] NF 3 [E] N 2 F 4
3 7. The following equation represents the complete combustion of ethane: 2C 2 H 6 ( g ) + 7O 2 ( g ) ⎯→ 4CO 2 ( g ) + 6H 2 O( g )

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## This note was uploaded on 03/17/2010 for the course CHEM 130 taught by Professor Jadwigasipowska during the Spring '07 term at University of Michigan.

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W_06+-+practice+exam+2a - MULTIPLE CHOICE. Choose the one...

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