The%composition of crystaline copper sulphate is cu=25042%,s=12.82%,o=25.70%and%of water =36 if the molecular mass is 249.5, calculate the molecular formula ( cu=63.5,s=32,o=16)
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Molecular mass of a compound is the sum of atomic masses of each element present in the molecule.
Molecular mass = atomic mass of Cu + atomic mass of S + (9 × atomic mass of O) + (10 × atomic mass of H) =63.5+32+9×16+10×1=249.5 gm/mole
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