1. Chemical Formula:

* Ammonium sulfide has the chemical formula (NH₄)₂S.

2. Hydrogen Atoms per Molecule:

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

* There are two ammonium ions in each molecule of ammonium sulfide.

* Therefore, each molecule of ammonium sulfide has 4 * 2 = 8 hydrogen atoms.

3. Avogadro's Number:

* Avogadro's number tells us that there are 6.022 x 10²³ molecules in one mole of any substance.

4. Calculation:

* Start with the number of moles of ammonium sulfide: 6.00 mol

* Multiply by Avogadro's number to find the number of molecules: 6.00 mol * (6.022 x 10²³ molecules/mol) = 3.61 x 10²⁴ molecules

* Multiply the number of molecules by the number of hydrogen atoms per molecule: 3.61 x 10²⁴ molecules * 8 hydrogen atoms/molecule = 2.89 x 10²⁵ hydrogen atoms

Answer: There are approximately 2.89 x 10²⁵ hydrogen atoms in 6.00 mol of ammonium sulfide.