What mass of NaCI must be dissolved in 65.0 g of water to lower the freezing point of water by 7.50°C? The freezing point depression constant (Kf) for water is 1.86°C/m. Assume van't Hoff factor for NaCI is 1.87. (Molar mass of NaCI = 58.5 g mol-1 )
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Answer:76mol
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