12. A 260-mL flask contains pure helium at a pressure of 758 tor. A second flask with a volume of 495 mL

contains pure argon at a pressure of 731 torr

Part A: If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium?

Part B: If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon?

Part C: If the two flasks are connected through a stopcock and the stopcock is opened, what is the total pressure?

14. Which of the following statements are true?

Check all that apply.

There are gas molecules that move faster than the average.

The average kinetic energy of gas molecules increases with increasing temperature.

The temperature of a gas sample is independent of the average kinetic energy.

All the gas molecules in a sample cannot have the same kinetic energy.

The average speed of gas molecules decreases with decreasing temperature.