The freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m

In a laboratory experiment, students synthesized a new compound and found that when 14.17 grams of the compound were dissolved in 275.9 grams of benzene, the solution began to freeze at 4.535 °C. The compound was also found to be nonvolatile and a non-electrolyte.

What is the molecular weight they determined for this compound?