The chemical reaction is: CO + Cl2 ==> COCl2. Suppose that you have measured the reaction products from and found out that they contained 3.0 kgs of chlorine; 10 kgs of phosgene, and 7 kgs of CO. What is the percent excess reactant used? What is the percentage conversion of the limiting reactant? What is the kg mol of phosgene formed per kg mol of total reactants fed to the reactor?