# Question 73cbd

Oct 31, 2015

The answer is (a) $2.4 \cdot {10}^{25}$

#### Explanation:

Well, you need to first figure out how many covalent bonds you have in one molecule of carbon tetrachloride, ${\text{CCl}}_{4}$.

To do that, take a look at the molecule's Lewis structure

Notice that the central carbo natom forms $4$ single bonds with four individual chlorine atoms. This tells you that you get $4$ covalent bonds per molecule of carbon tetrachloride.

So, how many would you get per mole?

You know that one mole of any substance contains exactly $6.022 \cdot {10}^{23}$ molecules of that substance - this is known as Avogadro's number.

This means that one mole of carbon chloride molecules will contain a total of

6.022 * 10^(23)color(red)(cancel(color(black)("molecules"))) * "4 cov. bonds"/(1color(red)(cancel(color(black)("molecule")))) = 2.41 * 10^(24)"covalent bonds"

Finally, ten moles of carbon chloride will of course contain 10 times more covalent bonds thatn one mole, so the final answer will be

10color(red)(cancel(color(black)("moles"))) * (2.41 * 10^(24)"cov. bonds")/(1color(red)(cancel(color(black)("mole")))) = color(green)(2.4 * 10^(25)"cov. bonds")#