One method for preparing chlorine gas involves heating hydrochloric acid with pyrolusite (manganese (IV) oxide), a common manganese ore. (Reaction given below.) How many g of HCl react with 7.70 kg of manganese (IV) oxide? ___HCl(aq) ___MnO2(s) → ___H2O(l) ___MnCl2 (aq) ___Cl2(g)