1. Understand the Formula:

* Ammonium sulfide has the chemical formula (NH₄)₂S. This means each molecule contains:

* 2 nitrogen atoms (N)

* 8 hydrogen atoms (H)

* 1 sulfur atom (S)

2. Calculate the Number of Molecules:

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

* For 8.30 moles of ammonium sulfide, you have:

* 8.30 moles * (6.022 x 10²³ molecules/mole) = 4.99 x 10²⁴ molecules

3. Calculate the Total Hydrogen Atoms:

* Since each molecule has 8 hydrogen atoms, the total number of hydrogen atoms is:

* (4.99 x 10²⁴ molecules) * (8 hydrogen atoms/molecule) = 3.99 x 10²⁵ hydrogen atoms

Therefore, there are approximately 3.99 x 10²⁵ hydrogen atoms in 8.30 moles of ammonium sulfide.