1. To Do 4th HW assignment due tomorrow by 10 pm.
3rd Quiz Wednesday (3/2) in Discussion.
Continue reading Chapter 6: we will finish Chapter 6 next week.

2. More CLC TA Hours Sunday: 3-7 pm (starting this Sunday, 2/28)
Thursday evenings: 5-7 pm (starting next Thursday, 3/3)

3. Chapter 5: Similar to #156
You have a sealed, flexible balloon filled with SF6(g). P = 1.00 atm, T = 25°C.
How can you make this balloon float? Solve for the new conditions.

4. Clicker Question
A 4.37 gram sample of a certain diatomic gas occupies a volume of 3.00 L at 1.00 atm and a temperature of 45C. Identify this gas.
a) H2
b) F2
c) O2
d) Cl2
e) I am not sure how to do this.

5. Effusion

6. Gas Concentration Matters!

7. “Ball on a Hill”