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Assuming complete dissociation of the solute, how many grams KNO 3 of must be added to 275 mL of water to produce a solution that

Assuming complete dissociation of the solute, how many grams KNO 3 of must be added to 275 mL of water to produce a solution that freezes at -14.5 °C? The freezing point for pure water is 0.0 °C and K f is equal to 1.86 °C/m.

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