A sample of ammonia gas was allowed to come to equilibrium at 400 K.        2NH3(g) N2(g) + 3H2(g)  At equilibrium, it was found that the concentration of H2 was 0.0372 M, the concentration of N2  was 0.0124 M, and the concentration of NH3 was 0.175 M.  What is Kp for this equilibrium?  (R = 0.0821 L ∙ atm/(K ∙ mol))

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