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Explanation:
In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or [tex]6.023 \ \times \ 10^{23}[/tex] entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is
[tex]n \ = \ \displaystyle\frac{\alpha}{N_{A}}[/tex],
where [tex]n[/tex] is the number of moles, [tex]\alpha[/tex] is the amount of substance and [tex]N_{A}[/tex] is the Avogadro's constant.
Therefore,
[tex]n \ = \ \displaystyle\frac{7.00 \ \times \ 10^{24} \ \text{atoms}}{6.023 \ \times \ 10^{23} \ \text{atoms mol}^{-1}} \\ \\ n \ = \ 11.624 \ \text{mol}[/tex].