A 10g sample of iron (¡¡) sulphate.FeSO4 was dissolved in water to make 250cm3 of solution.Exactly 25.0 cm3 of the solution was titrated with 0.025 mol/dm3 potassium manganate (vii),KMnO4,until the solution just turned pink.The volume potassium manganate (vii) that reacted with 25.0 cm3 of the solution was 23.5 cm3. Calculate the number of moles in 23.5cm3 of 0.025 mol/dm3 potassium manganate (vii)​