anonymous
  • anonymous
If there are 15x10^23 atoms of carbon in a sample, how many moles are there?
Chemistry
katieb
  • katieb
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anonymous
  • anonymous
\[15*10^{23}*6.022*10^{21}\]
anonymous
  • anonymous
\[=9.033*10^{45} atoms\]
anonymous
  • anonymous
is this correct?

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Preetha
  • Preetha
Brent, how do you convert atoms to moles?
anonymous
  • anonymous
is that not correct?
Preetha
  • Preetha
Looks right, you just multiplied it right?
anonymous
  • anonymous
yes
Preetha
  • Preetha
Next step? Xishem answered something similar earlier in your other question. So now you have to put in the right equation.
Rogue
  • Rogue
That is incorrect. You have to divide the # of atoms in the sample by Avogadro's #.\[\frac {15*10^{23} atoms}{6.02*10^{23} atoms/mol} \approx 2.49 mol\]
Preetha
  • Preetha
Rogue is correct. I was hasty. I concede.
Rogue
  • Rogue
Just make sure to see that you units make sense as a way of checking :)
Preetha
  • Preetha
And you are only in school, Rogue. Brilliant career ahead of you!
Preetha
  • Preetha
Brent, you have to make sure you know how to do these and understand the logic. Many people here can help you by explaining it. But you have to try to understand the concepts!

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