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magine that you have a 7.00 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 105 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.

  • chemistry - ,

    1. Write the equation and balance it.
    2C2H2 + 5O2 ==> 4CO2 + 2H2O

    2. How many moles O2 do you have? pV = nRT. Solve for n.
    3. Using the coefficients in the balanced equation, convert moles O2 to moles C2H2.
    4. Now convert moles C2H2 to p using PV = nRT.

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