A solution is 0.250 mole fraction methanol CH3OH and 0.750 mole fraction ethanol C2H5 OH. What is the molality of methanol in the solution? 10pts

1.5.67 g of glucose is dissolved in 25.2 g of water. Calculate the molality and mole fraction of theComponents of the solution. 8 pts

2.An aqueous solution is 0.120 m glucose. What are the mole fractions of each component in the solution? 10 pts

3.A solution is 0.250 mole fraction methanol CH3OH and 0.750 mole fraction ethanol C2H5 OH.
What is the molality of methanol in the solution? 10pts

4.An aqueous solution of oxalic acid, H2C2O4 , is 0.580 m. The density of the solution is 1.022g/mL. What is the molar concentration? 8 pts

5.A solution of vinegar is 0.763 M acetic acid , HC2H3O2. The density of vinegar is 1.004 g/ mL.
What is the molal concentration of acetic acid? 8 pts

6.A liter of water at 250 C dissolves 0.0404g of O2 when the partial pressure of oxygen is 1.00 atm.
What is the solubility of oxygen from air in which the partial pressure of O2 is 159 mm of Hg?
( Use Henrys Law) 6 pts

7.Calculate the vapor pressure at 350 C of a solution made by dissolving 20.2 g of sucrose, C12H22O11 in 70.1 g of water. The vapor pressure of pure water is 42.2 mmHg at 350 C. Also calculate the vapor pressure lowering. 10 pts

8.What is the boiling point of a solution of 0.150g of glycerol C3H8O3 in 20.0 g of water. What is its freezing point. Get the Kb and Kf value for water from your textbook. 10 pts

9.What is the freezing point of a 0.0075 m aqeous calcium chloride , CaCl2 ? Use the formula of the salt to obtain i value. 8 pts

10.Calculate the osmotic pressure at 200 C of an aqueous solution containing 5.0g of sucrose C12H22O11 in a 100.0 mL of the solution. 9 pts

11.Dextran is a polymer. An aqueous solution containing 0.582 g of dextran in 106 mL of solution at
210 C has an osmotic pressure of 1.47 mmHg. What is the average molecular weight of dextran? 13 pts