1. To Do… Lab tomorrow – exam review. OWL due tonight by 10 pm.
Lon Capa Exam Review (due Wednesday, February 7 by 7 pm)
OWL due tonight by 10 pm.
Exam Thursday, February 8.

2. Exam 1 Thursday, February 8, 7:00 pm–8:30 pm; Rooms on the website
Conflict: February 8; 5:00 pm – 6:30 pm in 1022 Lincoln Hall; sign up in 1026 CA
Practice exam is posted online.
See me right away if you have a conflict with the exam and conflict times.

3. Clicker Question a) H2 b) He c) O2 d) All have the same volume.
You are holding three balloons, each containing an equal mass of a different gas, and each gas acting ideally. The balloon containing which gas is the largest balloon?
a) H2
b) He
c) O2
d) All have the same volume.

4. Clicker Question
You have a certain mass of He gas in a rigid steel container. You add the same mass of Ne gas to this container at constant temperature. Which of the following best describes what happens?
a) The final pressure is twice the initial pressure.
b) The final pressure is greater than the initial pressure, but it is less than twice as large.
c) The final pressure in the container is more than twice the initial pressure.

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

6. Gas Law Problems
You are holding two 4.50-L balloons, one with helium gas and one with SF6 gas, both at 1.00 atm and 25°C.
Determine the number of moles of each gas.
Determine the mass of each gas.

7. 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.