1. Osmotic pressure exerted by a 0.325-g sample of the polymer polystyrene in 50.00 mL of benzene at 25 C is capable of supporting a column of the solution (d=0.88g/mL) 5.3 mm in height. What id the molar mass of the polystyrene? (Hint: What is the height of mercury [d=13.6 g/mL] equivalent to that of the polymer solution?)

2. When phenol, C6H5OH, is dissolved in bromoform, CHBr3, it is partially associated into dimers. The freezing point depression in a solution of 2.58 g phenol in 100.0 g bromoform is 2.374 C. The freezing point of bromoform is?

Question

1. Osmotic pressure exerted by a 0.325-g sample of the polymer polystyrene in 50.00 mL of benzene at 25 C is capable of supporting a column of the solution (d=0.88g/mL) 5.3 mm in height. What id the molar mass of the polystyrene? (Hint: What is the height of mercury [d=13.6 g/mL] equivalent to that of the polymer solution?)

2. When phenol, C6H5OH, is dissolved in bromoform, CHBr3, it is partially associated into dimers. The freezing point depression in a solution of 2.58 g phenol in 100.0 g bromoform is 2.374 C. The freezing point of bromoform is?