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March 27, 2017

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A sample of air contains 78.8% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 35 degrees C and 1.00 atm?

  • Chemistry - ,

    The percentages don't add to 100%. Please check the post for accuracy.

  • Chemistry - ,

    I'm sorry, that should read 78.08% nitrogen

  • Chemistry - ,

    You will have 0.7808 L nitrogen. How many moles is that? PV = nRT
    Then n x 6.022 x 10^23 = # molecules.
    The others are done the same way.

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