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Gaseous pressure calculation

  1. Oct 27, 2008 #1
    1. The problem statement, all variables and given/known data
    A sample of CO2(g) is contained in a 5.00 L flask at 350 K and 3.00 atm pressure. When 30.66 g of BaO(s) was added to the flask, this reaction took place:
    BaO(s) + CO2(g) => BaCO3(s)
    Calculate the pressure in the the vessel after the reaction was complete. assume that the temperature is constant and the volume of the solid product is neglegible.

    2. Relevant equations

    3. The attempt at a solution
    First, I tried to find the number of moles of CO2
    nCO2= PV/RT
    nCO2= (3.00atm*5.00L)/ 0.0821*350K
    nCO2= 0.522 mol CO2

    Then, should I find the number of moles of the BaO???
    nBaO= 30.66g/153.3g/mol of BaO =0.20 mol

    Now, I stuck, what can I do with all variables that I found? Please help.
    Last edited: Oct 27, 2008
  2. jcsd
  3. Oct 27, 2008 #2


    User Avatar

    Staff: Mentor

    Looking at the reaction equation - how much CO2 reacted with 0.20 mol of BaO? How much CO2 was left?
  4. Oct 27, 2008 #3
    Wow, I got the answer. Thank you so much!
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