1. Grab a Peer Eval Sheet from Hollick
Divide 100 points among your group members. Sign if you agree to terms. Staple Grade sheet side up to lab and turn into black tray

2. Gas Law Review

3. Dalton’s Law of Pressure
The total pressure is the sum of all pressures. ?

4. Baseball Review:
4 groups will make up 1 team. Each group represents 1 player. Each batting group that gets a question correct advances a base. Each outfield group that gets a question correct earns an out. Switch every 3 strikes. 1 run is 1 point. Number of points earned is extra credit on the test up to 5 points.

5. A sample of gas is held at a volume of 25 L and 3. 5 atm
A sample of gas is held at a volume of 25 L and 3.5 atm. If the pressure changes to 1.3 atm what is the new volume?

6. A sample of gas has a volume of 500 mL when the temperature is 310 K
A sample of gas has a volume of 500 mL when the temperature is 310 K. If the pressure is 875 torr, how many moles of gas are in the container?

7. A container contains 4 gases at the following pressures: 1
A container contains 4 gases at the following pressures: 1.29 atm, 760 torr, 200 kPa, and 0.98 atm. What is the total pressure in the container?

8. A 25 g of CH4 has a pressure of 4. 44 atm at 250°C
A 25 g of CH4 has a pressure of 4.44 atm at 250°C. What is the volume of the gas?

9. A sample of neon is at 89°C and 123 kPa
A sample of neon is at 89°C and 123 kPa. If the pressure changes to 145 kPa what is the new temperature?

10. 1. 28 g of dry ice (CO2) is placed in a 5. 00 L chamber that is at 35
1.28 g of dry ice (CO2) is placed in a 5.00 L chamber that is at 35.1°C. What is the pressure in the chamber after the dry ice has sublimated?

11. A weather balloon is filled with 10 L of air at atmospheric conditions, 27°C and atm. It is released into the upper atmosphere where the temperature is 2°C and the pressure is 0.49 atm. What is the new volume of the balloon?

12. Container 1 holds 3. 2 atm of gas. Container 2 holds 750 torr of gas
Container 1 holds 3.2 atm of gas. Container 2 holds 750 torr of gas. Container 3 holds 502 kPa of gas. If all three gases are combined into 1 container, what is the total pressure?

13. At standard temperature and pressure(STP), four balloons are filled each with one gram of different gases: Ar, HCl, N2, or NO. Which balloon contains the most molecules of gas? (a) Ar (c) N2 (b) HCl (d) NO (e) All are the same
C- convert grams to moles to molecules

14. A gas consists of only carbon and hydrogen. The gas has a density of 1
A gas consists of only carbon and hydrogen. The gas has a density of 1.65 g/L at 27°C and 734 torr. What is the molar mass?

15. A balloon at 25°C has a pressure of 840 torr and contains 1
A balloon at 25°C has a pressure of 840 torr and contains 1.3 mols of gas. If the balloon is put into the freezer at a temperature of 10°C what is the pressure?

16. What is the volume of 92.4 grams of chlorine gas that is at a temperature of 450 K and a pressure of 694 mmHg?

17. If a sample of an ideal gas has its pressure doubled and its Kelvin temperature tripled, its volume will be: (a) 3/2 of its original value (b) 1/2 of its original value (c) 2/3 of the original value (d) 6 times the original value A

18. A gas has a molar mass of 83. 78 g/mol
A gas has a molar mass of g/mol. The gas is held at a temperature at 20°C and kPa. What is the density of the gas?

19. A sample of chlorine gas is loaded into a 0. 25 L bottle at STP
A sample of chlorine gas is loaded into a 0.25 L bottle at STP. How many grams are in the container?