Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq), as described by the chemical equation
MnO,() + 4 HCl(aq) — MnCl, (aq) + 2 H, 0(1) + CI, (g)
How much MnO,(s) should be added p excess HCl(aq) to obtain 245 mL CI, (g) at 25 °C and 745 Torr?
mass of MnO