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Practice Quiz 1 - 1 NAME CHM 2046 Quiz 1 Spring 2006 Be...

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K p  = NAME: CHM 2046 Quiz 1 Spring, 2006 Be careful to give your final answer to the correct significant figures. SEE THE END FOR USEFUL  INFORMATION. Show your work. 1. a) ( 2 points each ) Balance the following reactions and write down their      mass-action expression, Q c . NH (g)    N (g) + H (g)  Q c  = H 2 O 2  (g) + NO (g)    H 2 O (g) + N 2 O 4  (g)  Q c  = b) ( 5 points ) At a particular temperature, K p  = 279 for the reaction 2 SO 2  (g) + O 2  (g)   2 SO 3  (g)  In a particular reaction carried out, the pressures of the gases at a  particular time are 0.12 atm  (atmospheres) of SO 2 , 1.2 atm of O 2 , and  2.4  atm of SO 3 . Has the reaction reached equilibrium yet?  Explain. If not, in which direction is it proceeding? Explain. c)  ( 4 points ) N 2 O 4  (g) was introduced into a 2.00 L flask and allowed to  reach equilibrium at 100  ºC.  At equilibrium, the flask contained 0.38 mol
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