The overall reaction is shown below. 3MnO42−+4H+→MnO2+2MnO4−+2H2O 3 moles of MnO42− produces 1 mol of MnO2 Therefore, 1 mole of MnO42− produces ‌
1
3
mol of MnO2 3 moles of MnO42− produces 2 mol of MnO4− Therefore, 1 mole of MnO42− produces ‌