7.47g of hydrated copper (II) tetraoxo sulphate (VI) crystals were heated in a dish to constant mass, the residue was found to weigh 4.77g. Calculate the number of moles of water of crystallization in the hydrated salt (Cu = 63.5, S=32, O = 16, H = 1.0)

• A.6.0 moles
• B.5.0 moles
• C.5.5 moles
• D.7.1 moles