You're asking about ammonium chloride (NH₄Cl), but it's important to understand that it's not a molecule, but an ionic compound.

Here's why:

* Ionic Compounds: These compounds are formed by the electrostatic attraction between positively and negatively charged ions.

* Ammonium Chloride: It consists of ammonium ions (NH₄⁺) and chloride ions (Cl⁻). These ions are held together by ionic bonds, not covalent bonds like in molecules.

Therefore, ammonium chloride does not have molecules. It's a network of ions.

To answer your question in a different way:

* One formula unit of ammonium chloride (NH₄Cl) contains one ammonium ion (NH₄⁺) and one chloride ion (Cl⁻).

Let me know if you have any other questions!