Write the equilibrium-constant expression for the reaction shown in terms of [A], [B], [C], and [D]. 3 A(g) + B(g) = 2 C(g) + 2 D(g) Note that Kc, which is sometimes symbolized as K or Keq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, Kc means the same thing as K and Keq.​