Question

what is mass of H20 in 1000kg of CuSO4.10H2O

Answer 1

In order to calculate , first of all we must know the molecular mass of the CuSO4.10H20. Which can be get by adding individual atom masses 

So the molecular mass of CuSO4.10H20= 339.78 g

becasue the water have molcular mass of 18

So 339.78 g of CuSO4.10H20 will contain water = 18 * 10 =180 gram 

1 g of CuSO4.10H20 will contain water = 180/339.78 g

And 1000 kg(1000000 g) of water will contain water= 529754.5 grams of water or 529.76 kg of water will be the mass of water

Answer 2

360.50 kg is the correct answer.