1. Fall 2018 Exam 1
1. d a
2. c a
3. c b
4. e d
5. e d
6. b a
7. b e
8. b

2. Fall 2018 Exam 1
16. Set 1: Choice A has greater mass. Choice A: 128 g oxygen gas Choice B: 96.0 g ozone gas Set 2: Choice B has greater mass. Choice A: 0.12 g He Choice B: 0.65 g He Set 3: Choice B contains more oxygen. Choice A: SrO is 15.5% oxygen by mass. Choice B: Na2O is 25.8% oxygen by mass.

3. Fall 2018 Exam 1
Increase, decrease, or constant?
Pressure of argon in chamber
Decrease
Volume of argon in chamber
Constant
Temperature of argon in chamber
Moles of argon in chamber
decrease
17. a. Fewer particles are present in the container which is at a constant volume and temperature. Therefore, there are fewer particles to collide with the container walls, which results in a lower force exerted on the walls of the chamber by the argon. This means that the pressure has decreased.

4. Fall 2018 Exam 1
Increase, decrease, or constant?
Pressure inside ballon
Decrease
Temperature inside balloon
Constant
Moles of nitrogen inside balloon
Volume of the balloon
increase
17. b.
The balloon is at constant temperature and volume. Because the pressure outside the balloon has decreased due to fewer particle collisions outside the balloon, the balloon expands until the internal and external pressure are the same.

5. Fall 2018 Exam 1