Write the `IUPAC` name of the compound `(A)` in which the molar rations of `C,H`, and `O` of equal having a molecular mass of 58

Explanation

Empirical formula of compound : C H O
Emprirical formula mass `= 12+1+16 = 19 "g mol"^(-1)`
`n=("Molar mass")/("Empirical formula mass")=((58 "g mol"^(-1)))/((29 "g mol"^(-1)))=2`
Molecular formula `= C_(2)H_(2)O_(2)`
Structural formula `{:("CHO"),(|),("CHO"):}`
IUPAC name : Ethanedial.