Question

1. An aqueous solution containing 15.5gof an unknown molecular (nonelectrolyte) compound in110.0gof water was found to have a freezing point of -2.0%u2218C.

Calculate the molar mass of the unknowncompound. "g/mol"

2. An aqueous solution contains 34% HClby mass.
- Calculate the molality of the solution. m
- Calculate mole fraction of the solution.

3. Calculate the vapor pressure of a solution containing24.8gof glycerin (C3H8O3) in 130mLof water at 30.0 %u2218C. The vapor pressureof pure water at this temperature is 31.8 torr. Assume that glycerinis not volatile and dissolves molecularly (i.e., it is not ionic)and use a density of 1.00 g/mL for the water."in torr"
4.