Answer:
There are [tex]3.9\times10^2^4[/tex] atoms in [tex]1.3\times10^2^4[/tex] molecules of nitrogen dioxide.
Explanation:
There are three atoms in 1 molecule of Nitrogen dioxide [tex]NO_{2}[/tex]. One Nitrogen and two oxygen atoms.
So,
1 molecule of [tex]NO_{2}[/tex] has 3 atoms
[tex]1.3\times10^2^4[/tex] molecules have
[tex]\frac{3 atoms\times1.3\times10^2^4molecules}{1molecule}[/tex] = [tex]3.9\times10^2^4 atoms[/tex]
