The relative atomic mass of aluminium is 27 and of oxygen is 16. The aluminium ore shown below contains 5.4kg of aluminium and 4.8kg of oxygen. What is the value of x?
Calculate the % of copper in copper sulphate, CuSO4
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
% Cu = 100 x 64 / 160 x = 1036.8
