1. Which solvent would be expected to have the greatest concentration of dissolved NH3 upon formation of a saturated solution at 25 C?

A. CCl4

B. CH3(CH2)4CH3

C. CH3COCH3

D. CH3CH2OH

E. CS2

2. Calculate the mole fraction of chloride ion in a solution prepared by dissolving 15.2 g of MgCl2 (95.2 g/mol) in 100 g of H2O (18.0 g/mol).

A. 0.0575

B. 0.0544

C. 0.0272

D. 0.0288

E. 0.0319

3. The vapor pressure of benzene (78.12 g/mol) at 25 C is 0.1252 atm. What is the change in the vapor pressure when 10.00 g of naphthalene (128.2 g/mol) is dissolved in 0.2000 kg of C6H6?

A. 0.9704 atm

B. 0.0296 atm

C. 0.0036 atm

D. 0.1215 atm

E. 0.9704 atm