In `CuSO_(4).5H_(2)O` how many molecules of water are indirectly connected to `Cu`

In solid CuSO_(4).5H_(2)O

CuSO_(4)*5H_(2)O is a

CuSO_(4)*5H_(2)O belongs to

Assertion : CuSO_(4).5H_(2)O has one hydrogen-bonded molecule of water. Reason : The four molecules of water are coordinated in CuSO_(4).5H_(2)O .

How many H_2O molecules are present in 90g of water