[charlie32]

Hi, I got questions about my chemistry homework. The masses of each of the following hydrates was measured , heated to drive off the water of hydration, then cooled. The masses of the residues were measured. Find the formula of the hydrate:

12.10 g Pb(CH3CO2)2 n H2O gave a residue of 10.38 g.

10.40 g NiSO4 nH2O gave a residue of 6.13 g

12.60 g of CaSO4 nH2O gave a residue of 9.96 g
b. find the mass percent water in this compound

[Borek]

Hi, I got questions about my chemistry homework.

You have posted the homework, but not your questions about it.