What is the molecular formula of the unidentified compound, Chemistry

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What is the molecular formula of the unidentified compound

What is the molecular formula of the unidentified compound? An unidentified covalent molecular compound contains only hydrogen, carbon, and oxygen. When 4.40 mg of this compound is burned, 1.04 mg of H₂O and 8.91 mg of CO₂ are produced. The freezing point of camphor is lowered by 18.4°C when 2.694 g of the compound is dissolved in 19.25 g of camphor (K_f = 40.0°C kg/mol).

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