A sample of a compound with a mass of 90.10 g is dissolved in 250.0 g of water. The freezing point of the resulting solution is 3.72 C. The freezing point depression constant for water is 1.86C kg solvent/mol solute. Upon analysis the compound is found to consist of 39.99 % carbon, 6.727 % hydrogen, and 53.28 % oxygen. What is the molecular formula of this compound?