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Homework Help: Static Electricity Problem

  1. Jan 16, 2008 #1
    So, I'm in first year university physics and each week we have online quizzes. And I'm having trouble figuring out how I got this question wrong.

    Q: In what amount of nitrogen gas are 0.8 MCb of negative charge? Note: each nitrogen atom has 7 electrons.

    The answer they gave is 5.92 x 10^(-1) mol
    but I'm not getting this answer, and I've tried so many times.

    I keep on getting 1.19 x 10^(0) mol.
    ---> What I did was find Q by = (7)(1.6 x 10^-19)(6.02 x 10^23) = 6.74 x 10^(5) Cb/mol
    ---> Then to find n I did = 0.8 x 10^6 / 6.74 x 10^5 = 1.19

    If anyone could help me, that would be great. This problem is really bothering me.
    THANKS :)
     
  2. jcsd
  3. Jan 16, 2008 #2

    mgb_phys

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    Remember nitrogen gas is N2
     
  4. Jan 17, 2008 #3

    olgranpappy

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    i think maybe this should be moved to the homework forums?
     
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