How many oxygen atoms does 1 mol 02 gas have?

One mole of O₂ gas contains 2 oxygen atoms per molecule. Therefore, 1 mole of O₂ consists of Avogadro's number of molecules, which is approximately 6.022 x 10²³ molecules. Since each molecule has 2 oxygen atoms, 1 mole of O₂ gas contains about 1.204 x 10²⁴ oxygen atoms.