Answer:
Explanation:
Hi there!
We have,
1 mole of Al = 6.23*[tex]10^{23}[/tex] atoms
Also given no. of atoms = 3.90 x [tex]10^{22}[/tex] atoms
Now,
6.23*[tex]10^{23}[/tex] atoms= 1 mole
1 atom = [tex]\frac{1 }{6.23*10^{23}}[/tex] moles
or, 3.90 x [tex]10^{22}[/tex] atoms = [tex]\frac{1 }{6.23*10^{23}}[/tex] *3.90 x [tex]10^{22}[/tex] moles
Therefore, 3.90 x [tex]10^{22}[/tex] atoms has 0.0626 mols of Al.
Hope it helps!