What are the mole fraction and the mass percent of a solution made by dissolving 2.25 g of KI in 0.400 L of water (d = 1.00 g/mL)?

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What are the mole fraction and the mass percent of a solution made by dissolving 2.25 g of KI in 0.400 L of water (d = 1.00 g/mL)?

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