Let N be the number of atoms and n be the number of moles, these quantities are related by the Avogadro's number:
[tex]N\approx6.02\times10^{23}mol^{-1}\cdot n[/tex]
Thus,
[tex]N\approx6.02\times10^{23}mol^{-1}\cdot3.6mol=21.672\times10^{23}=2.1672\times10^{24}\approx2.17\times10^{24}[/tex]
So, there are approximately 2.17 x 10²⁴ atom, which corresponds to alternative B.
