1. Understand the Formula:

* CH4 represents methane, a molecule with 1 carbon atom and 4 hydrogen atoms.

2. Moles and Avogadro's Number:

* 1 mole of any substance contains 6.022 x 10^23 particles (Avogadro's number).

3. Calculation:

* Atoms of H per molecule: 4

* Moles of CH4: 2

* Total H atoms: (4 atoms H/molecule CH4) * (6.022 x 10^23 molecules CH4/mol CH4) * (2 mol CH4)

* Total H atoms: 4.8176 x 10^24 hydrogen atoms

Therefore, there are approximately 4.8176 x 10^24 hydrogen atoms present in 2 moles of CH4.