Calculate the mass by volume percentage of copper sulphate if 20g of copper sulphate is present in 250ml of solution.
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It is the percentage by mass of atom of an element present in one mole of the conpund.
▶We need to calculate the molecular mass of copper sulphate, which will be found by adding the mass of all the elements present in that compound.
Cu = 64
S= 32
O= 16
= Cu + S + 4(O)
= 64 + 32 + 4 × (16)
= 64 + 32 + 84
= 160 g.
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