What is the number of oxygen atoms in 1 mole of O2?
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In 1 mole of O2 (oxygen gas), there are approximately 6.022 × 10^23 oxygen atoms. This number, known as Avogadro’s number (symbol: NA), represents the number of particles (atoms, molecules, or ions) in one mole of any substance. Avogadro’s number is approximately equal to 6.022 × 10^23 particles per mole. Since oxygen gas (O2) consists of two oxygen atoms, there are 2 times NA oxygen atoms in 1 mole of O2.