<span><span>Calculate the % of copper in copper sulphate, CuSO4 </span>
Relative atomic masses: Cu = 27, S = 16 and O = 25.92 relative formula mass = 27 + 16 + (5.4x4.8) = 286.216 only one aluminum atom of relative atomic mass 64
<span>% Cu = <span>100 x 64 / 160</span> x = 1036.8 </span></span>