Answer :

First, we calculate the molar mass of copper sulphate (CuSO4) crystal.

Molar mass of CuSO4 = 63 + 32 + 4×16

= 159 g

Now we will calculate the number of moles of copper sulphate (CuSO4)

Number of moles of CuSO4 =

And we know that 1 mole of CuSO4 = 6.023×1023 molecules

Hence, Number of = Number of moles of CuSO4×6.023×1023

molecules of CuSO4

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