In order for there to be 6.02 x 10²³ atoms of oxygen, there must be one mole of oxygen atoms because each mole of a substance contains 6.02 x 10²³ particles.
Now, each mole of H₂SO₄ contains four moles of oxygen. In order for there to be one mole of oxygen, there must be 1/4 mole of H₂SO₄
Therefore, there must be 0.25 moles of sulfuric acid, or 1.50 x 10²³ molecules, present in order for there to be 6.02 x 10²³ atoms of oxygen.
