It seems like you're asking for the chemical formulas of hexane, benzene, and acetylene. Here they are:

* Hexane: C₆H₁₄

* Benzene: C₆H₆

* Acetylene: C₂H₂

Explanation:

* Hexane: A straight-chain alkane with six carbon atoms and 14 hydrogen atoms.

* Benzene: An aromatic hydrocarbon with a ring structure of six carbon atoms and six hydrogen atoms.

* Acetylene: An alkyne with two carbon atoms and two hydrogen atoms, with a triple bond between the carbons.

Let me know if you'd like to know more about these compounds!