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What is the approximate osmotic pressure of a 0.2149 mol·kg-1 solution of LiCl at 10 °C? The freezing point of this solution is -0.415 °C. Express your answer in Pa.

An aqueous solution of KNO3 has a molal concentration of 1.099 mol·kg-1. Its density is 1.0630 g·mL-1. Calculate the molar concentration of KNO3. Calculate the mass percent of KNO3 in the solution. What is the mole fraction of KNO3 in the solution?

The vapour pressure of a mixture of 110 g of toluene and 42.8 g of an unknown compound is 0.885x10^4 Pa at 25 °C. The vapour pressure of pure toluene at 25 °C is 0.359x10^4 Pa, while that of the pure unknown is 1.55x10^4 Pa. What is the approximate molar mass of the unknown?

The vapour pressure of a mixture of 110 g of toluene and 42.8 g of an unknown compound is 0.885x10^4 Pa at 25 °C. The vapour pressure of pure toluene at 25 °C is 0.359x10^4 Pa, while that of the pure unknown is 1.55x10^4 Pa. What is the approximate molar mass of the unknown?