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22-08-2021
Chemistry

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Determine the percent water in CuSO4∙5H2O to three significant figures

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22-08-2021

Answer: 36.1%

Explanation: The molar mass of the complete molecule, CuSO4*5H2O is 249.6 g/mole. The molar mass of just the water (5H20) is 90 g/mole. Assume 1 mole of CuSO4*5H2O, the percent water would be:

90g H2O/249.6g CuSO4*5H2O = 0.361 or 36.1%

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