(Answered) Each copper ii sulfate unit is associated with five water

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Each copper (II) sulfate unit is associated with five water molecules in crystalline copper (II) sulfate pentahydrate (CuSO₄ ⋅ 5H₂O). When this compound is heated in air above 100^oC, it loses the water molecules are also its blue color:

CuSO₄ ⋅ 5H2O → CuSO₄ + 5H₂O

If 9.60 g of CuSO₄are left after heating 15.01 g of the blue compound, calculate the number of moles of water originally present in the compound.

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