4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound

A) the same molecular formula but different chemical properties.

Explanation:

Isomerism is the existence of a compound with the same molecular formula but different molecular structures due to the difference in the arrangement of atoms or spatial orientation of the atoms. In such a compound, they differ in physical and/or chemical properties. Such possible structures are known as isomers.

Propanol and isopropanol differs only in the arrangement of atoms but they both have the same molecular formula. Their physical and chemical properties differ.