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Avogadro's constant, number of moles, number of particles

  1. May 7, 2014 #1
    Dealing with these has reminded me why I hated chemistry.

    What is the relationship between the above 3? Given atomic weight of nitrogen and Avogadro's constant, can the number of moles be found?
     
    Last edited: May 7, 2014
  2. jcsd
  3. May 7, 2014 #2

    adjacent

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  4. May 7, 2014 #3

    adjacent

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    You don't need Avogadro's constant there.
    1 mole = Atomic mass of Nitrogen

    You should never call that atomic weight. It's atomic mass.
     
  5. May 7, 2014 #4

    Borek

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    Number of moles of what?
     
  6. May 7, 2014 #5

    That's new. My physic assignment called that atomic weight which throws in further confusion.

    1 mole = 1 atomic mass of Nitrogen?
     
  7. May 7, 2014 #6
    Nitrogen. Given Avogadro's constant and the atomic mass of Nitrogen being 28g/mol, is it possible to determine the number of moles?
     
  8. May 7, 2014 #7

    adjacent

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    Oh sorry it should be --> not =

    1 mole of Nitrogen --> atomic mass of nitrogen.

    So 1 mol --> 28
    x -->28
    Cross multiply. You get 1 mole again.
    Didn't you study that?

    1 mole of any element --> atomic mass of that element.


    I leave all these to Borek. He knows better.
     
  9. May 7, 2014 #8

    Borek

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    Number of moles of nitrogen in what?
     
  10. May 7, 2014 #9

    In 28g?
     
  11. May 7, 2014 #10

    Borek

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    Yes. This is trivial - 28 g is a molar mass of N2. If you have 28 g of a substance that has molar mass of 28 g/mol, how many moles do you have?

    It is like asking "how many dozens in twelve?".
     
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