QUIZ 12 i                 CHEM 20                   Name_______________

PV=nRT P1V1/T1 P2V2/T2 R= .08206 literxatm/( Kxmole)

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1 Circle the correct word for each statement.

a) Volume is (directly / inversely) proportional to pressure.

b) Pressure is (directly / inversely) proportional to volume.

c) Volume is (directly / inversely) proportional to temperature.

d) Pressure is (directly / inversely) proportional to temperature.

2 Calculate the volume of 2.00 grams of hydrogen gas at 20.0 °C and 2.00 atm pressure.
 
 
 
 
 
 

3 5.00 liters of a gas at S.T.P. is heated to 400.0 K and the pressure is brought to 900 torr. What is the new volume of the gas?
 
 
 
 
 
 
 
 

4 1.00 grams of aluminum is reacted with hydrochloric acid according to the equation: 2Al + 6HCl ----> 2AlCl3 + 3H2 . What volume of gas will be collected over water at 25.0 °C and 740.0 torr?
 
 
 
 

5 What volume of hydrogen is needed to completely react with 1.00 L of oxygen to form water? Hint: Balance the equation and apply Avogadro's Law.
 
 
 
 
 
  6 A sample of gas at 760 torr and 20°C is heated until the volume is three times the original volume. The pressure is then increased until the volume is returned to the original volume. What is the final pressure.
 
 
7 Oxygen effuses through a hole at a rate of 2.00 liters/minute. At what rate will hydrogen effuse trhough the same hole under the same conditions?