The following concentrations were obtained for the formation of $NH_3(g)$ from $N_2(g)$ and $H_2(g)$ at equilibrium and at 500K: $[N_2] 1×10^{-2} M, [H_2] -2×10^{-2} M$ and $[NH_3]=2×10^{-2} M$. The equilibrium constant, K., for the reaction
$N_2(g)+3H_2(g)2NH; (g)$ at 500K is