PV = nRT    R= 0.082 LAtm/Kmol      P1V1   =    P2V2            1 moleSTP   =       moleSTP        
                                                               T1              T2               22.4 L                 L

   6.02 x 1023    =                         moles =   grams
    1 mole                    mole                         MW
---------------------------------------------------------------------------------------------------------------
                     Chemistry 101      Quiz 8A        11/3/98       Dr. B. Jackson

111.   152 Torr is _____ Atm.    a) 0.5     b) 0.2      c) 2.0      d) 1.5

112. If the pressure remained constant, the volume of a gas is ______ proportional to the temperature.
     a) directly      b) inversely

113. The Standard Temperature in STP is    a) 0oF     b) 0oK       c)
0oC

114. At 200oC a sample of gas had a volume of 5 L.  What would be the new volume if the   temperature was decreased to 100oC?  The pressure remained constant.
     a) 10 L    b) 6.3 L    c) 3.9 L      d) 2.5 L

115. If the pressure on 10 liters of a gas is decreased from 8 Atm to 2 Atm, the new volume of
      the gas would be
     a) 50 L     b) 2.5 L      c) 20 L      d) 5 L     e) 40
116. A steel container contained a gas which was at 227oC and 1 Atm pressure.  The temperature was
      increases to 420oC.  What is the new pressure?
     a) 1.40 Atm     b) 1.88 Atm     c) 0.53 Atm     d) 0.71 Atm

117. A 10 L sample of gas was at 227oC and 0.5 atm pressure.  What would be the new volume when    
   the temperature was raised to 427oC and the pressure was raised to 1.5 atm?
     a) 6.2 L     b) 4.7 L       c) 0.5 L     d) 0.21 L     e) 12.5 L

118. Which of the following is Charles' Law?
     a) As the temperature of a gas increases, the volume increases. (Pressure constant)
     b) As the pressure of a gas increases, the volume decreases (Temperature constant)
     c) As the temperature of a gas increases, the pressure increases. (Volume constant)

119.  What is the volume of 0.25 moles of H2 gas at STP?
          a)11.2 L    b) 0.8 L     c) 1.5 x 1023 L     d) 5.6 L      e) 22.4 L

120. How many moles of oxygen gas are present in 6.0 L at 3 Atm pressure and 27oC?
     a) 1.37       b) 8.1        c) 0.73        d) 0.49    e) 0.06

121. How many grams of N2 gas are present in 11.2 Liters at STP?
     a) 14     b) 28     c) 56     d) 0.5

122. How many N2 molecules are present in 5.6 L of N2 gas at STP?
     a) 0.25     b) 14      c) 7        d) 3.01 x 1023        e) 1.5 x 1023 

123.  What is the mass of 1 liter of Cl2 gas at STP?
     a) 22.4 g      b) 6.02 x 1023 g     c) 71.0 g      d) 3.2 g       e) 0.045 g

124. A gas occupied 6.15 liters at 1 Atm pressure and 27oC.  It had a mass of 7.0 grams.  
        What is the gas?
     a) N2      b) NH3        c) CO2       d) Cl2        e) O2

Ans: 111b; 112a; 113c; 114c; 115e; 116a; 117b; 118a; 119d; 120c; 121a; 122e; 123d; 124a