The formula NH₄₂S is incorrect. It should be (NH₄)₂S, which represents ammonium sulfide.

Here's why and how to find the number of hydrogen atoms:

* (NH₄)₂S indicates that there are two ammonium ions (NH₄⁺) combined with one sulfide ion (S²⁻).

* Each ammonium ion (NH₄⁺) contains 4 hydrogen atoms.

* Since there are two ammonium ions, the total number of hydrogen atoms is 4 atoms/ion * 2 ions = 8 hydrogen atoms.

Therefore, there are 8 hydrogen atoms present in (NH₄)₂S.