Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Please help me with this problem

  1. May 17, 2009 #1
    please i need to solve this problem, can you help me out. thank you.
    equation: 2C8H18 (l) + 25O2 (g) → 16CO2 (g) + 18H2O (l)
    a)2.62kg(one gallon) of gasoline is burned with 7000.0L of oxygen gas at STP. what is the limiting reagent?
    b) what mass of carbon dioxide is produced in part?
    c) if 6.4 kg of carbon dioxide is collected in the lab using the amounts in part(a), what is the percent yield for this experiment?
  2. jcsd
  3. May 17, 2009 #2
    Could you please tell us what you have done already, and where exactly you need help/don't understand?
  4. May 18, 2009 #3
    The questions are clear, but the problem is that we can't answer to homeworks here .
  5. May 18, 2009 #4


    User Avatar
    Homework Helper
    Education Advisor
    Gold Member

    You would perform most of your calculations in mole units. Since your given quantity of gasoline is in gallons(a volume unit), you need to know this gasoline's density (or specific gravity, at least something to work with); the density will give you the mass, and the mass will give you the moles (obviously using suitable conversion calculations).

    The "l" in your reaction means "liquid", and the "g" in your reaction means "gas"
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook