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Calculate the equilibrium constant (K) for the formation of NH^ in the following reaction: `N_2(g) + 3H_2(g) At equilibrium, the concentration of `NH_3`, `H_2` and `N_2` are `1.2 xx 10^(-2) ,3.0 xx 10^(-2)` and `1.5 xx 10^(-2)` M respectively.

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