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# Determine the number of atoms in 1.99 mol Zn. And how do you solve these these types of problems?

Step by step please?

Update:

That's exactly what I did, but the answer was incorrect ?

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- Anonymous1 decade agoFavorite Answer
I will do the work here, then explain it:

1.99 mole Zn * (6.022 * 10^23/ 1mole) = 1.198 * 10^24 atoms (this is in scientific notation)

In order to solve this problem, you need to use Avogadro's number, which is 6.022 times 10 to the 23 power (in scientific notation). Avogadro's number is the number of things (such as atoms or molecules) in one mole. So in this case, there are 6.022 * 10^23 atoms of Zn in one mole of Zn. In order to find the number of atoms in 1.99 moles of Zn, multiply that number by Avogadro's number over one mole.

Source(s): Chemistry class

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