Question

What does one mole of oxygen atom represent?

Answer 1

One mole is the term used to denote a certain group of atoms. One mole of any element has the same number of particles or atoms, which are equal to the Avogadro number of atoms. Moles and grams are different quantities used for measuring chemical compounds.

Complete answer:
A mole is a quantity which is used to denote the number of atoms in any compound. One mole of any atom consists of the same number of particles. The oxygen atom has the atomic number of 8 and the atomic mass of 16 u. These quantities of oxygen atoms of one mole have an Avogadro number of particles. The Avogadro number is denoted by ${{N}_{A}}$ or ${{N}_{0}}$.
1 mole of oxygen atom represents the Avogadro number. The value of the Avogadro number is $6.022\times {{10}^{23}}$. This is named after the scientist Amedeo Avogadro. This is the constituent particles in any element.
Hence, one mole of oxygen atoms represents $6.022\times {{10}^{23}}$ particles.

Additional information:
Apart from oxygen, any element with 1 mole has the Avogadro number of particles, which are $6.022\times {{10}^{23}}$. The molecules like carbon dioxide, $C{{O}_{2}}$ also contain $6.022\times {{10}^{23}}$ particles in 1 mole of its quantity. This can also be said for oxygen that 16 gram atomic mass of oxygen contains $6.022\times {{10}^{23}}$ atoms or particles.

Note:
There is also a law called Avogadro’s law that states that, at equal conditions of temperature and pressure, different gases having equal volumes contain equal numbers of molecules. This can be represented by Vn = K, where V is volume, n is number of moles, and K is the proportionality constant.