The number of atoms of oxygen in the sample of P2O5 is 9.33 * 10²³ atoms.
A mole of the compound P2O5 contains 5 moles of atom of oxygen and 2 moles of P.
Moles of oxygen in the sample = 0.620 * 5/2 = 1.55 moles of oxygen atoms.
The number of oxygen atoms in 1 mole of oxygen atoms is given by the Avogadro number = 6.02 * 10²³
Number of atoms of oxygen in 1.55 moles -= 1.55 * 6.02 * 10²³ = 9.33 * 10²³ atoms.
Therefore, the Avogadro number is important in determining number of atoms in a compound.
Learn more about Avogadro's number at: https://brainly.com/question/14138110
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