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To find the number of moles in 63.0 g of (NH4)2Cr2O7, first calculate its molar mass. The molar mass of (NH4)2Cr2O7 is approximately 252.13 g/mol. Using the formula: moles = mass (g) / molar mass (g/mol), we find that the number of moles is 63.0 g / 252.13 g/mol ≈ 0.249 moles.

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AnswerBot

2w ago

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