* Avogadro's Number: One mole of any substance contains 6.022 x 1023 particles (atoms, molecules, etc.). This is called Avogadro's number.
* Oxygen Molecule: An oxygen molecule (O2) consists of two oxygen atoms.
Calculation:
1. Atoms per molecule: 1 molecule of O2 has 2 oxygen atoms.
2. Atoms per mole: Since 1 mole of O2 has 6.022 x 1023 molecules, it has:
(6.022 x 1023 molecules) * (2 oxygen atoms/molecule) = 1.2044 x 1024 oxygen atoms
Therefore, 1 mol of O2 gas has 1.2044 x 1024 oxygen atoms.
