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Topic: Moles in Formula  (Read 4145 times)

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Offline fcb

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Moles in Formula
« on: May 01, 2010, 05:49:56 AM »
Calculate the number of moles of Fe3+ ions, CO32- ions, C atoms and O atoms contained in 6.0 mol of iron3+ and carbonate. Fe2(CO3)3

This is my answer. Can someone please confirm as my text book doesn't contain answers for the question.
6.0 mol of Fe3+
18 mol of CO32- ions
18 mol of C atoms
54 mol of O atoms

Thanks so much for your help in advance.

Offline Borek

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Re: Moles in Formula
« Reply #1 on: May 01, 2010, 07:51:20 AM »
Something is wrong - you have to decide whether it is 6 moles of Fe3+ or 6 moles of iron (III) carbonate.
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Offline fcb

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Re: Moles in Formula
« Reply #2 on: May 02, 2010, 04:42:46 AM »
Thanks for you reply Borek, Have i done the question wrong? I am moving head of the class so i wont know how to do it until we are taught this in class

Could you please give me a heads up as to how to do it.

Regards.

Offline fcb

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Re: Moles in Formula
« Reply #3 on: May 02, 2010, 04:57:21 AM »
Sorry, Its  6 moles of iron (III) carbonate.

Offline Borek

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Re: Moles in Formula
« Reply #4 on: May 02, 2010, 05:12:28 AM »
Sorry, Its  6 moles of iron (III) carbonate.

So 6 moles of Fe3+ is wrong, but others were OK.
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Offline fcb

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Re: Moles in Formula
« Reply #5 on: May 02, 2010, 05:43:03 AM »
Ohh, I see where i went wrong. Is it 12 moles of Fe3+?

You're a legend Borek!

Offline Borek

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Re: Moles in Formula
« Reply #6 on: May 02, 2010, 06:00:52 AM »
Ohh, I see where i went wrong. Is it 12 moles of Fe3+?

Yes.
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