Chemistry
Grade-9
Easy

Question

Mass of H2O in 1000 kg CuSO4 .5H2O is:

  1. 36Kg
  2. 36.05Kg
  3. 360Kg
  4. 3605Kg

hintHint:

For one mole CuSO4.5H2O has 5 moles of water i.e. 90g

The correct answer is: 36.05Kg


    Mass of CuSO4.5H2O = 249.5 (atomic mass of copper, sulfur, oxygen is 63.5g, 32g, 16g respectively and molecular mass of water is 18g)
    For one mole CuSO4.5H2O, 5 moles of water i.e. 90g
    Number of moles of CuSO4.5H2O in 1000kg is 4.008 cross times 103. Hence, number of moles of water is 20 cross times 103 moles.
    Mass of water in 1000kg CuSO4.5H2O is almost 360.5kg

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