Fuel engineers used the extent of the change of CO and H₂O to CO₂ and H₂ to regulate the proportions of synthetic fuel mixtures. If 0.250 mol of CO and 0.250 mol of H₂O are placed in a 1.25 mL flask at 900 K, what is the composition of the equilibrium mixture? At this temperature, K_c is 1.56.