27. Solving a chemistry problem

5. a) What must be the molar concentration of an ideal solution at 20°C in order for osmosis to raise a column of solution with a density of -1.0 g/cm3 to a height of 100 feet? b) What is the vapor pressure of this solution at 20 C? The vapor pressure of pure water at this temperature is 17.363 mm Hg. Art.