A monoprotic acid is an acid that can donate only one proton (hydrogen ion, H+) per molecule. Here are a few examples:

* Hydrochloric acid (HCl): This is a strong acid commonly found in the stomach.

* Nitric acid (HNO3): This is a strong acid used in the production of fertilizers and explosives.

* Acetic acid (CH3COOH): This is a weak acid found in vinegar.

* Formic acid (HCOOH): This is the simplest carboxylic acid and is found in ant stings.

These are just a few examples; many other acids are monoprotic.