[scienci]

An unidentified covalent molecular compound contains only carbon, hydrogen, and oxygen. When 8.90 mg of this compound is burned, 21.16 mg of CO2 and 2.48 mg of H2O are produced.
The freezing point of camphor is lowered by 18.4°C when 1.214 g of the compound is dissolved in 12.00 g of camphor (Kf = 40.0°C kg/mol).

What is the molecular formula of the unidentified compound?Please show or explain your steps....

[Borek]

You have to show your attempts at solving the problem to receive help. This is a forum policy.