If you were absent for the Race of the Gases Lab

You can view the videos below and get an idea of what occurred with the gases when they diffused in the glass tube. You then need to see me for additional info you will need to complete the lab. When you come to see me you need to have your procedure read and pre-lab completed.
 
Race of the Gases Animation:
 
Great diffusion video that includes an actual demo of the lab: