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Express the equilibrium constant for the following reaction. N2(g) + 3 H2(g)⇔ 2 NH3(g) A) K = [N2][H2]^1/3 / [NH3]^1/2 B) K = [NH3]^2 / [N2][H2]^3 C) K = [NH3]^1/2 / [N2][H2]^1/3 D) K = [NH3]^6 / [N2]3[H2]^9 E) K = [N2][H2]^3 / [NH3]^2