Finding Equilibrium Concentration of a Gas

The equilibrium constant (K) of a reaction is a crucial parameter that quantifies the ratio of products to reactants at equilibrium. Consider the following reaction:

A(g) + B(g) <=> C(g) + D(g)

The equilibrium constant for this reaction at a certain temperature is given by K = 4.0. If the initial concentrations of A, B, C, and D are 2.0 M, 2.0 M, 0.0 M, and 0.0 M, respectively, what will be the concentration of C at equilibrium?