The following reaction begins when 0.56 mol of CO and 0.64 mol of H2O are added to a 2.00 L reaction vessel at a constant temperature. CO(g) + H2O (g) = CO2(g) + H2(g) At equilibrium, there were 0.22 mol of CO in the reaction vessel. Calculate K, for the reaction at this temperature. Enter your answer with no units.