It's impossible to say how many hydrogen atoms are in ammonia cleaning solution without more information. Here's why:

* Ammonia is a molecule (NH3): A single ammonia molecule has 3 hydrogen atoms.

* Cleaning solution concentration: Ammonia cleaning solutions come in varying concentrations. A higher concentration means there are more ammonia molecules per unit of volume.

* Volume of the solution: The amount of solution you're considering will also determine the number of hydrogen atoms present.

To calculate the number of hydrogen atoms, you'd need to know:

1. The concentration of ammonia in the solution: This is usually expressed as a percentage (e.g., 10% ammonia solution).

2. The volume of the solution: This could be in liters, milliliters, etc.

Let me know if you can provide these details, and I can help you calculate the number of hydrogen atoms!