What Is the Molar Mass of Toluene If 0

Multiple Choice

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100.g of benzene by 0.47°C? K_f of benzene is 5.12°C/m.

A) 927 g/mol
B) 92.6 g/mol
C) 81.8 g/mol
D) 78.0 g/mol
E) 10.7 g/mol