1.22 g of water
Explanation:
We need to look at molecular mass of the hydrated calcium chloride.
Molecular mass of CaCl₂·2H₂O = 40 + 35.5 × 2 + 2 × 18 = 147 g/mole
Considering 1 mole of hydrated calcium chloride we devise the following reasoning:
if 147 g of hydrated calcium chloride contains 36 g of water
then 5 g of hydrated calcium chloride contains X g of water
X = (5 × 36) / 147 = 1.22 g of water
Learn more about:
hydrated salts
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