I am working on the calculations for the effusion rate of napthtalene and other calculations for the pressures (in torr and atm). I am stuck on this. I have the amount of weight loss, temperature, and area of hole. I am not able to relate the equation for effusion rate to my experiment. Effusion rate=ZwA=(pA(Avogadro's number)) / sqrt( 2(pi)MRT). If anyone understands try to fill me in, or if there is an example experiment on-line anywhere, I could really appreciate the help. Thank you.

Erica