The Mn3O4 formed on strong heating of a sample of MnSO4.4H2O was dissolved in 100cc of 0.1(N) FeSO4 containing H2SO4. The resulting solution reacted completely with 50cc of KMnO4 solution. 25cc of this KMnO4 solution requires 30cc of 0.1(N) FeSO4 solution for complete reaction. Calculate the amount of MnSO4.4H2O in the sample.
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