You look at the formula.
CuSO4*5H2O has 5 mols of H2O per mols CuSO4. Mols can be changed to molecules if you want the acutal number of molecules of water.
Another question. How do I find out how many molecules of water of hydration are in each formula unit of a compound? I want to solve the actual problem myself, but would like some headway.
2 answers
So just take 5 mols of water and convert to molecules?