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A solution contains 10.05 g of unknown compound dissolved
in 50.0 mL of water. (Assume a density of 1.00 g>mL for water.)
The freezing point of the solution is -3.16 °C. The mass percent
composition of the compound is 60.97% C, 11.94% H, and the
rest is O. What is the molecular formula of the compound?