A 1.267 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8). When the sample is dissolved in water to a total volume of 35.2 mL, the osmotic pressure of the solution is 4.00 atm at 293 K. What is the mass percent of vitamin C and sucralose in the sample? vitamin C: % sucralose:

When 11.2g of an organic compound known to be 70.58%C,5.9%H, and 23.50%O by mass is dissolved in 935.5g of benzene, the freezing point is 5.04C. The normal freezing point of benzene is 5.49C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. Kf values for various solvents are given in the colligative constants table