Answer:
12.96 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
From the question we have
[tex]n = \frac{7.80 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 12.95681...[/tex]
We have the final answer as
12.96 moles
Hope this helps you
