A reaction vessel contains NH3, N2, and H2 at equilibrium at a certain temperature. The eq...

A reaction vessel contains NH3, N2, and H2 at equilibrium at a certain temperature. The equilibrium concentrations are [NH3] = 0.25 M, [N2] = 0.11 M, and [H2] = 1.91 M, Calculate the equilibrium constant Kc for the synthesis of ammonia if the reaction is represented as

(a) N2(g) + 3H2(g) ⇆ 2NH3(g)

(b)