1. Which solvent, water or hexane (C₆H₁₄) would you choose to dissolve the following compounds? Why?

2. In the 'Méthode Champenoise' grape juice is fermented in a wine bottle at 25°C to produce sparkling wine according to the reaction below. Fermentation of 750.0 mL of grape juice (d = 1.00 g/mL) is allowed to take place in a bottle of a total volume of 825 mL until 12% by volume is ethanol (C₂H₅OH; d = 0.789 g/mL).

a) Calculate the number of moles of carbon dioxide produced.

b) The concentration of carbon dioxide in the bottle of sparkling wine is 1.80 M. What is the partial pressure of CO₂?

(k = 32 L atm/mol)

3. The normal boiling point of methanol (CH₃OH) is 64.7°C. A solution of a nonvolatile solute in methanol has a vapor pressure of 710.0 torr at 64.7°C.

a) What is the mole fraction of methanol?

b) If the solution was prepared with 4.50g methanol and 1.281g solute,what is the molecular weight of the solute?

4. The celcius temperature scale is based on the physical properties of water with 0°C set at the melting point of pure water and 100°C set at the boiling point of pure water. What molality of an aqueous glucose (C₆H₁₂O₆) solution would expand the temperature scale by approximately 10°C?