There's no single, specific formula for "carbon hydride" because this term describes a broad class of compounds. Here's why:

* Many Combinations: Carbon and hydrogen can combine in various ratios to form numerous compounds. The most common examples are:

* Alkanes: General formula CnH2n+2 (e.g., methane - CH4, ethane - C2H6, propane - C3H8)

* Alkenes: General formula CnH2n (e.g., ethene - C2H4, propene - C3H6)

* Alkynes: General formula CnH2n-2 (e.g., ethyne - C2H2, propyne - C3H4)

* Cyclic hydrocarbons: These have various structures and formulas, including cycloalkanes, cycloalkenes, and aromatic hydrocarbons like benzene (C6H6).

* Isomers: Even with the same formula, different arrangements of atoms (isomers) can exist, leading to different compounds. For example, there are two isomers of butane (C4H10): n-butane and isobutane.

In Summary:

To discuss a specific carbon hydride, you need to specify the particular compound by its name or chemical formula, considering the number of carbon and hydrogen atoms and their arrangement.