What structural formula represents an aromatic hydrocarbon?

Answer 1

An aromatic hydrocarbon is represented by a structural formula that includes a benzene ring, characterized by alternating double bonds between carbon atoms, or by a circle within a hexagonal ring of carbon atoms. The simplest example is benzene (C₆H₆), which has the formula represented as a hexagon with a circle inside, indicating resonance among the carbon-carbon bonds. Other aromatic hydrocarbons, like toluene or naphthalene, also contain this benzene ring structure but with additional carbon and hydrogen substituents.