1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Molecules in a vacuum

  1. Feb 19, 2008 #1


    User Avatar

    How many molecules exist in one cubic centimeter of space at a pressure of 10^-15 atm and temperature of 20 degrees C?
  2. jcsd
  3. Feb 19, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    PV = nRT
    Where P pressure, V volume, T absolute temperature, n number of moles and R is a constant
    You can find the units and value of R in the tetbook or wiki.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook