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The freezing point of benzene, C6H6, is 5.500 degrees C at atmosphere. Kf(benzene) = 5.12 degrees C/m. in a laboratory experiment, students synthesized a new compound and found that when 12.63 grams of the compound were dissolved in 226.3 grams of benzene, the solution began to freeze at 4.451 degrees C. The compound was also found to be nonvolatile and non-electrolyte. What is the molecular weight they determined for this compound? ____ g/mol