Given a formula representing a compound, Which formula represents an isomer of the compound?

NY Chemistry Regents Exam Jan 2023

50 Given a formula representing a compound:

Which formula represents an isomer of the compound?

Solution: Isomers are molecules that have the same molecular formula but different structure. The formula for the compound is C3H8O. Compound 1 has the same formula but different structure and is therefore the correct answer choice.