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How to find the mass of a compound given the half life and activity?

  1. Apr 7, 2010 #1
    1. The problem statement, all variables and given/known data
    What mass of Na2 SO4 has an activity of 10.0 mCi? Sulfur-38 has an atomic mass of 38.0 and a half life of 2.87h


    2. Relevant equations

    Half life= 0.693/ k

    Rate= kN

    3. The attempt at a solution
    I'm not sure where to begin the sulfur-38 part is throwing me off
    All I need is some hint as to where to begin
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 7, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    What 10 mCi means?

    --
    methods
     
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