2. Chlorine can be produced by the reaction: 2KMnO, + 16HCI 2KCI + 2MnCl2 + 5C1, +8H,0 (a) What mass of KMnO4 is required to produce 2.5 L of Cl, gas measured at STP? (b) Calculate the volume of commercial hydrochloric acid required. (Commercial grade hydrochloric acid is 36.0% HCl by weight, and has a density of 1.18 g mL-'.) 3. A gasoline mixture containing 60.0% by weight octane (CH3) and 40.0% by weight hexane (CGH14) has a density of 0.660 g mL-'. Calculate the number of cubic meters of air at STP drawn through the carburetor when one imperial gallon of this gasoline is combusted in an automobile engine, assuming complete combustion of the fuel to carbon dioxide and water