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

Help with gases PLEASE

  1. May 5, 2004 #1
    Can someone please calculate the volume occupied at STP by 2.99times10 to the 23rd power molecules of Chlorine. Thank you Very much.
  2. jcsd
  3. May 5, 2004 #2


    User Avatar
    Science Advisor

    All gases have a specific size at STP. I think it's 22.4L IIRC. Just multiply 22.4 * (2.99 * 10^23) / (avogadro's number)
  4. Jun 9, 2004 #3
    avogadro's number = 6.02*10^23

    incase you didn't know
  5. Jun 10, 2004 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    1. Use the Ideal Gas Law, PV =nRT, with n= [tex]\frac {2.99*10^{23}} {6.02*10^{23}} [/tex], to find V. You know, P, T, R, n.


    2. At STP, one mole of an ideal gas occupies 22.4 liters. One mole has 6.02*10^23 molecules. Use ratios to find the volume of 2.99*10^23 molecules.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook