Question

How much copper can be obtained from 100 g of copper sulphate (${CuSO}_4$)?

Answer 1

$1$ mole $CuS{O}_4$ contains $1$ mole of $C{u}^{2+}$ and $1$ mole of ${S{O}_4}^{2-}$.

The molar masses of copper and copper sulphate are $63.5$ g/mol and $159.6$ g/mol respectively.

100 g of copper sulphate will contain $\frac{63.5}{159.6}\times 100=39.76$ g of copper.