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Ethyl Acetate

  1. Nov 21, 2015 #1
    1. The problem statement, all variables and given/known data

    A bottle of nail polis remover contains approximately 2.5 mol of ethyl acetate (C4H8O2)
    How many atoms are in the bottle?

    2. Relevant equations
    ?

    3. The attempt at a solution
    Would there just be 14 atoms?
     
  2. jcsd
  3. Nov 21, 2015 #2
    Review the definition of the mole. Is there only one molecule of ethyl acetate in the entire bottle?
     
  4. Nov 21, 2015 #3
    Would it be 1.02 x 10 25 atoms?
     
  5. Nov 21, 2015 #4

    Borek

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    That's not what I got (but much better than the initial 14 atoms).

    Where did this number came from?
     
  6. Nov 21, 2015 #5
    N=nNA
    N=(2.5mol)(6.02x1023)
    N=1.5x1024mol

    NC=(1.5x1024mol)(4)=6.0x1024
    NNH=(1.5x1024mol)(8)=1.2x1025
    NNO=(1.5x1024mol)(2)=3.0x1024

    Then I added all of my answers up.

    Edit by Borek: closed formatting tags.
     
    Last edited by a moderator: Nov 22, 2015
  7. Nov 21, 2015 #6

    SteamKing

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    To be sure, the units here are molecules of ethyl acetate.
    It's hard to follow your calculations here. They seem to be shrinking.

    Edit by Borek: corrected.

    Each and every molecule of ethyl acetate has 4C + 8H + 2O = 14 atoms.

    Wouldn't it be easier to multiply the number of atoms in each molecule of ethyl acetate by the number of molecules of ethyl acetate in the bottle?
     
    Last edited by a moderator: Nov 22, 2015
  8. Nov 21, 2015 #7
    14 multiplied by 1.5x1024 molecules?
     
  9. Nov 21, 2015 #8

    SteamKing

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    More specifically, 14 atoms / ethyl acetate molecule times 1.5 × 1024 ethyl acetate molecules / bottle of nail polish remover = ?
     
  10. Nov 21, 2015 #9
    2.1x1025atoms?
     
  11. Nov 21, 2015 #10

    SteamKing

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    Yes.
     
  12. Nov 22, 2015 #11

    Borek

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    Not exactly. You added

    6.0x1024 + 1.2x1024 + 3.0x1024

    instead of a correct

    6.0x1024 + 1.2x1025 + 3.0x1024
     
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