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Homework Help: Rate of Production with Given Information

  1. Jan 3, 2015 #1
    1. The problem statement, all variables and given/known data

    2 KClO3 (s) + heat --> 2 KCl (s) + 3 O2 (g)

    If 0.20 g of KClO3 (s) decomposes in 2.8 s, at what rate is oxygen O2 (g) released over this time at SATP?

    2. Relevant equations

    n = PV/RT

    3. The attempt at a solution

    Converted KClO3 to mol.

    .20 x 1 / 122.5495g = 0.001632 mol KCl

    Find rate of decomposition :

    .001632 mol in 2.8 sec --> 2 mol in 3431.37 sec

    2/3431.37 = .000583 mol/s

    The rate of decomposition of KClO3 is .000583 mol/s

    I'm stuck at this part. I know I need to use some sort of n = PV/RT since it tells me that it is at SATP. Can I have some hints or help?
  2. jcsd
  3. Jan 3, 2015 #2


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