An unknown compound contains only C,H, and O. Complete combustion of 7.40g of this compound produced 18.1g CO₂ and 7.40g H₂O. What is the empirical formula of the unknown compound? Insert subsc
a) CH₂O
b) C₂H₄O₂
c) C₃H₆O₃
d) C₄H₈O₄