Nonane is a hydrocarbon which is isomeric with 2-methyl-3-ethyl hexane.
Isomers are the compounds having the same molecular formula but different physical and chemical properties. 2- methyl-3- ethyl hexane and nonane have the same molecular formula: C9H20. Therefore, nonane is a hydrocarbon which is isomeric with 2-methyl-3-ethyl hexane.