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Charge contained in this gas

  1. Mar 15, 2009 #1
    1. The problem statement, all variables and given/known data

    Suppose you have 2.0 mol of O2gas.
    How many coulombs of positive charge are contained in this gas in the atomic nuclei?


    2. Relevant equations

    q = Ne

    3. The attempt at a solution

    i guess i have to use the avogadros's number somehow. but not sure how does that fit in this equation
     
  2. jcsd
  3. Mar 15, 2009 #2

    berkeman

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    Staff: Mentor

    Yes you do. What is the definition of Avagadro's number? That gets you most of the way to the answer...
     
  4. Mar 15, 2009 #3
    so we have 6.023*10^23 atoms in 1 mole.
    so in 2 mole we have 6.023*10^23*2 = 12.046*10^23 proton
    and the charge of each proton is 1.6*10^-19.
    so total positive charge would be 1.6*10^-19*12.046*10^23 = 19.27*10^4
    but that wasnt the right answer
     
  5. Mar 15, 2009 #4

    berkeman

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    Staff: Mentor



    Re-read the problem statement.... :wink:
     
  6. Mar 15, 2009 #5
    im sorry i dont get it.
    if we use the above equation, then e = q/N = 2/6.023*10^23 = 0.33*10^-23
    ???
    Im lost
     
  7. Mar 15, 2009 #6

    berkeman

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    Staff: Mentor

    The numbers you are using are for a monatomic gas. Oxygen gas is diatomic....
     
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