CₙH₂ₙ₊₁OH

Where:

* n represents the number of carbon atoms in the molecule.

Let me break it down:

* Cₙ: This part indicates the number of carbon atoms present in the alkanol molecule.

* H₂ₙ₊₁: This represents the number of hydrogen atoms. The 'n' is the same as the number of carbons, and we add 1 to account for the additional hydrogen atom attached to the oxygen.

* OH: This is the hydroxyl group, which is characteristic of all alcohols.

Examples:

* Methanol (CH₃OH): n = 1

* Ethanol (C₂H₅OH): n = 2

* Propanol (C₃H₇OH): n = 3

This formula helps you predict the molecular formula of any alkanol based on the number of carbon atoms it contains.