Question: how many moles of water are present per mole of cuso4?
Answer: For example, if heating some hydrated copper (II) sulfate gave off 0.060 moles of water, and left behind 0.012 moles of anhydrous copper (II) sulfate (CuSO4), then the ratio is 5:1, and the formula would be written as CuSO4•5H2O. There are five moles of water in the hydrated salt for every mole of CuSO4.