Question

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If the total mass of oxygen present in CuSO4.5H2O is 160 g, then calculate the total number of electrons present in CuSO4.5H2O

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Answer 1

Molecular mass of a compound is the sum of atomic masses of each element present in the molecule. 

Molecular mass = atomic mass of Cu + atomic mass of S + (9 × atomic mass of O) + (10 × atomic mass of H) =63.5+32+9×16+10×1=249.5 gm/mole

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