Balance Equation First!

MnO2(s) + HCl(aq) -> MnCl2(aq) + Cl2(g) + H2O(l) ) a) If 1.24 mol MnO2 and 56.5 g HCl react, show using calculations and reasoning which reagent is in excess (not completely used up)? MnO2(s) + HCl(aq) -> MnCl2(aq) + Cl2(g) + H2O(l) + b) If the above reaction produces Cl2 in only 65.7% yield, what mass of Cl2 is isolated from the reaction