The equilibrium constant for the synthesis of ammonia  N2(g) + 3 H2(g) --> 2 NH3(g) has the value K = 3.19 × 10^-4 at  400°C. Calculate the equilibrium partial pressures of N2(g), H2(g), and NH3(g) if the total pressure is 1.00 atm and the H:N atom ratio in the system is 3;1. (Hint: Try the approximation that PN2  and PH2  > PNH3  and see if the resulting equations are simpliied.)

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