One mole of ${\mathrm{CO}}_2$ contains-

Avogadro’s number (NA):

• $6.02\times {10}^{23}$is known as Avogadro’s number (NA).
• Avogadro’s number represents the number of atoms or molecules present in one mole of a substance.
• One mole of Carbon dioxide contains one mole of Carbon and one mole of Oxygen.

$\underset{\mathrm{Carbon}}{\mathrm{C}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$

• One mole of Carbon contains $6.02\times {10}^{23}$ atoms.
• One mole of Oxygen contains $6.02\times {10}^{23}$ atoms.
• One mole of ${\mathrm{CO}}_2$contains $6.02\times {10}^{23}$molecules.