When 3.56 g of an unknown hydrocarbon was dissolved in 125 g of benzene, the freezing point of the solution was found to be 4.41oC. Analysis of the hydrocarbon showed that it contained 93.71% carbon (by mass) and 6.29% hydrogen. Determine the molecular formula of the unknown hydrocarbon. The freezing point of benzene is 5.50 °C and Kfp = -5.12 °C/m.