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The changes

  1. Feb 4, 2009 #1

    Maroc

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    Gold Member

    1. The problem statement, all variables and given/known data
    How would you know wheather its a chemical change or physical change


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 5, 2009 #2

    Borek

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    Staff: Mentor

    What does your book say about?
     
  4. Feb 5, 2009 #3

    Maroc

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    just says something about the physical apperance as for chemical a change in the gas happens...i dont get it
     
  5. Feb 6, 2009 #4

    Borek

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    Staff: Mentor

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