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

Atoms in a gas

  1. Nov 16, 2003 #1
    Gas is N2O4.
    fill in the chart. I've got all but atoms.

    how do I get the # of atoms?
    why wouldn't it be the same as molecules:
    1 mol/22.4L * 6.02x10^23 molecules/1 mol * 5.02L
    = 1.35x10^23 molecules
    molecules of are: 1.35x10^23
    why couldn't I just replace the word 'molecules' with atoms
    ie, 6.02x10^23 atoms in the above conversion and get
    the same answer?

    molecules: 1.35x10^23
    Atoms: ??? how do you set this up?
    Mass: 20.6g
    Vol at STP: 5.02L

    answer from book is 8.10x10^23 atoms
  2. jcsd
  3. Nov 16, 2003 #2
    1 molecule of N2O4 contains 6 atoms (assume that all of the bonds are covalent).

    6 * Your Answer = Their Answer
  4. Nov 16, 2003 #3
    cool :smile:
  5. Nov 16, 2003 #4
    Happy to help. :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook