Assignment:
Q1. Calculate the molality of a solution of 14.0 g of Mn(NO3)2 in 250 g of water.
Q2. Calculate the molarity of a solution made by taking 60.0 mL of 2.79 M. NaOH and diluting it to a final volume of 260mL.
Q3. A natural alcohol has been isolated by an ethnobotanist working in the Amazon. A solution of 6.38 g of this alcohol, in 210 g of carbon tetrachloride, freezes at -29.6 degrees C. What is the molar mass of this substance? The freezing point depression constant of this solvent is 29.8 degrees C/m, while the freezing point is -22.3 degrees C.
Q4. A 15.9 %, by mass, solution of propanol, CH3CH2CH2OH, is found to have a density of 1.14 g/mL in water. What is the molarity of this solution, given these measurements?
Q5. Calculate the vapor pressure of water above a solution prepared, by adding 43.5 g. of lactose (C12H22O11) to 100.0 g. of water at 30.0 degrees C. The vapor pressure of water at this temperature is 31.8 torr.
Provide complete and step by step solution for the question and show calculations and use formulas.