## Part C of question E.17

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Michael Novelo 4G
Posts: 64
Joined: Fri Sep 28, 2018 12:28 am

### Part C of question E.17

I was confused with part c of question E.17 in the Atkins 7E textbook. Which sample in each of the following pairs contains the greater number of moles of atoms. (C) 7.36 x 10^27 atoms of Ru or 7.36 x 10^27 atoms of Fe. I began with trying to convert the atoms back to moles by dividing the 7.36 x 10^27 atoms by 6.022 x 10^23 and got 1.22 x 10^4 moles for both Ru and Fe so I suspected both have the same # of moles of atoms but it doesn't seem like they can be both equal since they're different elements but does anyone else know what to do?

Raj_Bains_2C
Posts: 66
Joined: Fri Sep 28, 2018 12:25 am
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### Re: Part C of question E.17

You did not need to do any calculations for this problem because it already states that there are equal amounts of atoms. Therefore, none from the pair contains more moles of atoms. They contain equal amounts.

ElliotPourdavoud 1A
Posts: 36
Joined: Fri Sep 28, 2018 12:16 am

### Re: Part C of question E.17

Atoms per mole is a constant, so if they have the same amount of atoms they have the same amount of moles.

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