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How to solve this compound question?

  1. Dec 16, 2008 #1
    i got this formula

    [itex]
    2Fe +3O_2 -> 2FeO_3
    [/itex]

    how many grams of Fe and litters of oxigen do i need
    in order to get 0.5 kilogram of

    [itex]
    Fe_2O_3
    [/itex]

    i can find how much grams weighs each mole of each molecule?

    i dont know how to do the rest

    ??
     
  2. jcsd
  3. Dec 16, 2008 #2

    Borek

    User Avatar

    Staff: Mentor

  4. Dec 17, 2008 #3
    ok i understand
    3 moles of
    [itex]
    O_2
    [/itex]
    can react at most with 2 moles of Fe


    how do i transform the volume of a gas into grams?
     
  5. Dec 17, 2008 #4

    Borek

    User Avatar

    Staff: Mentor

    pV=nRT, ideal gas equation.
     
  6. Dec 17, 2008 #5
    ok by pst 22.4 litters for every mole of gas
    i can find the weight of each mole
    what now?
     
  7. Dec 17, 2008 #6

    Borek

    User Avatar

    Staff: Mentor

    Now you start thinking on your own, we are not here to spoonfeed you.

    How many moles of product?

    How many moles of reactants needed?
     
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