1) Consider the molecular weight of the metal be M
Now as it is isomorphous with ZnSO4.7H2O it would be of the formula MSO4.7H2O
Percentage of M in the compound would be
M×100M+ weight of SO4+7× weight of H2O
=M×100M+96+126
=9.87
The Sulphate of a metal contains 20% metal. This sulphate is isomorphous with zinc sulphate hepta hydrate. The atomic mass of the metal is