$25.0\,\text{g}$ of hydrated copper(II) sulfate crystals are heated so that anhydrous copper(II) sulfate and water vapour are produced. $\text{CuSO}_4\cdot5\text{H}_2\text{O(s)} \rightarrow \text{CuSO}_4\text{(s)} + 5\text{H}_2\text{O(g)}$ Calculate the mass of anhydrous copper(II) sulfate made. $[M_r: \text{CuSO}_4 = 160; \text{H}_2\text{O} = 18]$
- A$9.0\,\text{g}$
- B$16.0\,\text{g}$
- C$22.5\,\text{g}$
- D$25.0\,\text{g}$