1.74 moles
Explanation:
A mole of a substance is defined as:
The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of [tex]^{12}C[/tex].
Any substance has [tex]6.022\times 10^{23}[/tex] atoms in one mole of that substance.
[tex]\text{Number of moles}=\frac{\text{given number of atoms}}{6.022\times 10^{23}}[/tex]
Given number of atoms are [tex]1.05\times 10^{24}[/tex]
So,[tex]\text{Number of moles}=\frac{1.05\times 10^{24}}{6.022\times 10^{23}}[/tex]=[tex]1.74[/tex] moles
