When 18.9 g18.9 g of an organic compound known to be 65.45% C65.45% C, 5.5% H5.5% H, and 29.06% O29.06% O by mass is dissolved in 694.9 g694.9 g of benzene, the freezing point is 4.23 C4.23 C. The normal freezing point of benzene is 5.49 C5.49 C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. ff values for various solvents are given in the colligative constants table.