1. As always… OWL Lon-Capa assignments Lecture videos Textbook Read
Do text homework

2. Clicker Question
Consider a gas mixture consisting of equal masses of helium and oxygen at 1.00 atm and 25.0 °C.
Determine the density of this gas mixture. 
a) g/L
b) g/L
c) g/L
d) g/L
e) I do not know how to do this.

3. Egg in a Bottle Using liquid nitrogen to cool the bottle.
What factors are changing?
What factors are staying constant?

4. Egg in a Bottle Placing a burning cotton ball in the bottle.
What factors are changing?
What factors are staying constant?

5. Wednesday’s OWL #1 (Chapter 5 #44)
Determine the partial pressure of each gas as shown in the figure.
Note: The relative numbers of each type of gas are depicted in the figure.

6. Clicker Question
Assuming the connecting tubes have negligible volume, what is the total pressure after the stopcock is opened?
He, 4.00 L Ar, 2.00 L
2.00 atm 3.00 atm 
a) atm b) atm c) atm d) atm e) atm

7. The Partial Pressure of each Gas in a Mixture of Gases in a Container Depends on the Number of Moles of that Gas

8. Kinetic Molecular Theory
Gases consist of particles in constant random motion.
Temperature is a measure of average kinetic energy.
Pressure is due to collisions of gas particles with the container.