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First Order Decomposition -> % of compound. Please help

  1. Feb 19, 2009 #1
    First Order Decomposition -> % of compound. Please help!!!

    1. The problem statement, all variables and given/known data
    In a first order decomposition, the constant is 0.00313 sec-1. What percentage of the compound has decomposed after 7.17 minutes?

    2. Relevant equations
    rate = ln[A]o - ln[A]t = kt


    3. The attempt at a solution
    I feel bad because I have no idea how to solve this problem. My 1st test is soon to come, please help me!
     
  2. jcsd
  3. Feb 19, 2009 #2
    Re: First Order Decomposition -> % of compound. Please help!!!

    Oh, please ignore this message because I got the answer already. After talking with my friend for awhile, I finally understand how to work this problem out. I am sorry if I ever bother you.
    Sincerely,
     
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