Hydrogen and chlorine gases react according to the following equation: H2(g) + Cl₂(g) ⇆ 2HCl(g). At equiLiBrium, the following concentrations were found: [H2] = 0.45M, [Cl₂] = 0.075M, and [HCl] = 0.90. What is the equiLiBrium constant (Kc) for this reaction?