Which formula represents an isomer of ch3-ch2-cooh

Methylethanoate with the molecular formula; CH₃- CO₂-CH₃

Explanation:

The Molecular formula of the given compound CH₃ - CH₂- COOH is called propanoic acid. Molecular formula expresses the exact number and kinds of atoms of the elements present in the molecule of a compound. Propanoic acid is the second compound in the group of carboxylic acids. The certain similarities these carboxylic acids posses is due to the functional group - COOH. Functional groups is the categorization of atoms within molecules that possess their own certain characteristics which makes them distinct from other functional groups.

The molecular formula which represents an isomer of the given compound  CH₃ - CH₂- COOH is called Methylethanoate with the molecular formula; CH₃- CO₂-CH₃

Isomers are existence of two or more compounds with the same exact molecular formula but with different molecular structures due to the difference in the arrangement of atoms or spatial orientation of atoms.