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February 27, 2007
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# How many oxygen atoms are there in one mole of carbon dioxide?

I know that there are 6.02 x 10^23 atoms in one mole of carbon dioxide, but I don't know. I'm just really confused right now. I've been working on my chemistry summer packet all day...
by Robbie
Member since:
October 21, 2007
Total points:
4,471 (Level 4)

Well

Look at it this way,

1 mol carbon dioxide (CO2) contains 1 mol of carbon atoms and 2 mols of oxygen atoms.
1 mol = 6.02 x 10^23
2 mol = X

Cross multiple the 6.02 x 10^23 by 2 and you get
1.02 X 10^24 oxygen atoms in one mole of carbon dioxide
This was the only correct answer, although the last one seems right too, but I checked somewhere else, and this one's it! Thanks! :-)

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• Member since:
July 26, 2007
Total points:
3,051 (Level 4)
Lol I've always sucked at chemistry, but this is one thing I get. In one molecule of carbon dioxide, there are three parts: two oxygen atoms (dioxide= "two oxygen") and one carbon atom. Therefore, 2/3 of every carbon dioxide molecule is oxygen, so 2/3 of a mole of carbon dioxide is oxygen. Multiply 6.022 x 10^23 by 2/3 and that's how many oxygen atoms are in a mole of carbon dioxide. Good luck. :)
• Member since:
April 13, 2008
Total points:
1,201 (Level 3)
2 ? i think