Here's a breakdown:
* C: Carbon
* H: Hydrogen
* O: Oxygen
The numbers indicate the number of atoms of each element in the molecule:
* 2: Two carbon atoms
* 5: Five hydrogen atoms
* 1 (implied): One oxygen atom
* OH: This group indicates a hydroxyl group, which is a key component of alcohols.
Ethanol is a common alcohol found in alcoholic beverages and is also used as a solvent, fuel, and in many industrial processes.