Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide as well as chlorine at elevated temperatures: CO (g)+ Cl2 (g) COCl2 (g). If 0.430 mol of each reactant is placed in a 0.500 L flask at 600 K, explain what are the concentrations of all three substances at equilibrium Kc = 4.95 at this temperature?