Question

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Calculate the relative molecular mass of Hydrated copper sulphate $CuSo_{4} 5H_{2}O$

[ H = 1, O = 16, S = 32, Cu = 64 ]


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Answer 1

Answer:

Correct option is

B

249.5 gm/mole

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