A solution made by dissolving 150.0 g of an unknown compound in 425.0 mL of benzene to make a solution which has a freezing point 18.6 °C lower than that of pure benzene. Kf for benzene is 5.12 °C/m and the density of benzene is 0.877 g/mL.
Required:
a. What was the molality of the solution?
b. How many moles of the unknown compound were dissolved in the solution?
c. What is the molar mass of the unknown compound?
Answers: 3
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