Menthol is a crystalline substance with a peppermint taste and odor. When 1.10g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 5.87 °C. The freezing point and Kf constant for cyclohexane can be found here. Calculate the molar mass of menthol.

When a 22.275 g sample of Compound B,  is dissolved in 480.2 g of benzene, the freezing point of the following solution is 3.73 ˚C. The freezing point of  benzene is 5.48 ˚C, and the Kf for benzene is 5.12 ˚C/m. Determine the molar mass of Compound B.

1. Suppose that you add 27.5 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 3.58 oC compared to pure benzene. What is the molar mass (in g/mol) of the unknown compound? 2. What is the freezing point (in degrees Celcius) of 3.70 kg of water if it contains 187.4 g of CaBr2? The freezing point depression constant for water is 1.86 oC/m and the molar mass of CaBr2 is 199.89 g/mol. 3. What mass, in grams, of NaCl needs to be added to 1.6 kg of water in order to create a solution with a freezing point of -5.6 °C? The freezing point depression constant of water is 1.86 ºC/m.

When 15.0 g of an organic compound known to be 54.53% C, 9.2% H, and 36.32% O by mass is dissolved in 721.4 g of water, the freezing point is -0.293 °C. The normal freezing point of water is 0 °C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. Kf values for various solvents are given in the colligative constants table. molecular formula: CHO

When 911. mg of a certain molecular compound X are dissolved in 35.0 g of benzene (C,H6), the freezing point of the solution is measured to be 2.5 °C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. Ox10 미□

When 1.38 g of a certain molecular compound X are dissolved in 90.0 g of cyclohexane (C,H,,), the freezing point of the solution is measured to be 6.3 °C. Calculate the molar mass of X. If you need any additional information on cyclohexane, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. x10

Suppose a group of students tell you that they added solid sodium chloride NaCls to 35 mL of deionized water and they did not record how many grams of NaCl they added but they got a freezing point depression of 1.25°C. Calculate how many grams of NaCl the students added. The pure freezing point of water is 0.00°C and the freezing point depression constant (K) of water is 1.858 °C/m. Remember that NaCl is a solid salt and an ionic compound therefore it contributes a negligible amount to the overall additive volume and keep track of its van't Hoff factor. The density of water at 20°C is 0.9982 g/mL.