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09-01-2023
Chemistry

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What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing of water by 7.5 o C ? The freezing point depression constant (Kf ) for water 1.860 C/m. Assume Van't Hoff factor for NaCl is 1.87. (Molar mass of NaCl= 58.5)

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