ChemistryChemical combinationJAMB
Find the percentage by mass of water of crystallisation in CuSO₄·5H₂O. (Cu = 64, S = 32, O = 16, H = 1)
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Answer: D. 36%
M = 64 + 32 + 64 + 90 = 250; water = 90/250 × 100% = 36%.
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