Chlorine forms from the reaction of hydrochloric acid with manganese(IV) oxide. The balanced equation is given below: MnO2 + 4 HCl → MnCl2 + Cl2 + 2 H2O. Calculate the theoretical yield and the percent yield of chlorine if 69.5 g MnO2 and 49.0 g HCl react. The actual yield of chlorine is 18.0 g.