Question

2. Which gas has the lowest density at 25 °C and 1 atm?

Select one:

a. O₂

b. Ar

c. N₂

d. F₂

e. C₃H₈

4. If the volume of a confined gas is expanded to four times the original volume while its temperature remains constant, what change will be observed?

Select one:

a. The pressure of the gas will decrease to 1/4 its original value.

b. The pressure of the gas will decrease to 1/2 its original value.

c. The pressure of the gas will remain unchanged.

d. The pressure of the gas will increase to twice its original value.

e. The pressure of the gas will increase to four times its original value.

5. 36.6 L of He gas at STP is pumped into a 10.0-L tank containing 1.0 atm of O₂ at 25 °C. What is the total pressure in a tank at 25 °C?

Select one:

a. 2.0 atm

b. 5.0 atm

c. 5.4 atm

d. 8.0 atm

e. 8.8 atm

Answer 1