
1  Which of the following quantities are indirectly proportional to each other? 



V and n 



T and P 



P and V 



Kinetic Energy and T 





2  A balloon with 0.05 mol of gas with a volume of 500 mL at 25ºC is placed in a freezer where the temperature is 10ºC. If 0.02 mol of gas is let out of the balloon, and the pressure remains constant, what is the new volume of the balloon? 



735 mL 



177 mL 



52.1 mL 



265 mL 





3  52.5 g of Ar are placed in a 16.3 L container and heated to a temperature of 150ºC. What is the pressure of the gas? (R = 0.0821 Latm / molK) 



0.990 atm 



2.79 atm 



6.23 atm 



112 atm 





4  Calculate the density of water vapor (H_{2}O) in g/L at 300ºC and 1072 mm Hg. (R = 0.0821 Latm / molK, 1 atm = 760 mm Hg) 



0.540 g/L 



1.03 g/L 



1.85 g/L 



411 g/L 





5  Given the following equation: C_{3}H_{8} + 5 O_{2} > 3 CO_{2} + 4 H_{2}O
How many L CO_{2} at STP are produced from the combustion of 52.7 g C_{3}H_{8}? (R = 0.0821 Latm / molK) 



87.5 L 



80.3 L 



26.7 L 



5.56 L 





6  0.690 g of a gas are transferred into a 1.00 L flask at 300 K. The pressure is measured to be 760 mm Hg. What is the molar mass of the gas? (R = 0.0821 Latm / molK, 1 atm. = 760 mm Hg) 



17.0 g/mol 



37.4 g/mol 



110. g/mol 



284 g/mol 





7  A tank contains 3.00 moles of O_{2}, 6.00 moles of He and 5.00 moles of Ar. At a certain temperature, the pressure of the mixture is 3040 mm Hg. What is the partial pressure of the He? (1 atm = 760 mm Hg) 



456 mm Hg 



2280 mm Hg 



1.71 atm 



4.71 atm 





8  Which of the following gases would effuse SLOWEST at the same temperature and pressure? 



H_{2} 



F_{2} 



CO_{2} 



Xe 





9  Calculate the speed of a Cl_{2} molecule at 10ºC. (R = 8.31 x 10^{3} gm^{2} / s^{2}molK) 



59.3 m/s 



60.0 m/s 



315 m/s 



1003 m/s 





10  Given the b.p. of the following compounds at 1 atm., which compound should behave more like an ideal gas at 150ºC? 



He (b.p.: 269ºC) 



Hg (b.p.: 357ºC) 



SO_{2} (b.p.: 10ºC) 



Br_{2} (b.p.: 59ºC) 




