The freezing point of a solution prepared by dissolving 7.50 g of a nonvolatile nonelectrolyte
unknown compound in 100.00 mL of benzene (C6H6, density 0.876 g/mL) is 3.80 ºC. The normal
freezing point of benzene is 5.50 ºC and the freezing point depression constant for benzene is 5.12
ºC/m. Determine the molar mass of the unknown compound