The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO4⋅7H2O. The atomic weight of M is

As the given sulphate is isomorphous with ZnSO4⋅7H2O its formula would beMSO4⋅7H2O⋅m is the atomic weight of M, Molecular weight of MSO4⋅7H2O=m+32+64+126=m+222Hence % of M =mm+222×100=9.87 (given) or100m=9.87m+222×9.87 or 90.13m=222×9.87 or m=222×9.8790.13=24.3