25.0 cm3 of the aqueous solution of R requires 24.80 cm3 of 0.2 mol dm-3 manganate (VII) for complete reaction. The equation for the reaction is
5 Fe2+(aq) + MnO4- (aq) + 8 H+ → 5 Fe3+(aq) + Mn2+(aq) + 4H2O(l)
Calculate EACH of the following.
(i) The number of moles of MnO4- used