Chapter 13 Questions (Dr. Burns) A. Answer the following questions regarding colligative properties (8 pts total) 1. Determine the vapor pressure of a benzene (CoHe) solution if 54.00 g of eicosane (C20H42) is dissolved in 286.0 g of benzene. The vapor pressure of benzene under standard conditions is 12.7 kPa (3 pts). 2. Calculate the freezing & boiling point of a 14.0% by mass aqueous solution of calcium chloride (3 pts). 3. 168 mg of an unknown nonelectrolyte is dissolved in 0.257 L of water at 25.0 C. It exerts an osmotic pressure of 2.29* 102 atm. What is the molar mass of this compound (2 pts)? Chapter 14 Questions (Dr. Burns)