Question

Question #73cbd

Answer 1

The answer is (a) `2.4 * 10^(25)`

Explanation:

Well, you need to first figure out how many covalent bonds you have in one molecule of carbon tetrachloride, `"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 * 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")`