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  3. 2. which gas has the lowest density at 25 °c an

2. Which gas has the lowest density at 25 °C and 1 atm? Select one: a. O2 b....

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Chemistry

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 theoriginal volume while its temperature remains constant, what changewill be observed?

Select one:

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

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

c. The pressure of the gas will remain unchanged.

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

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

5. 36.6 L of He gas at STP is pumped into a 10.0-L tankcontaining 1.0 atm of O2 at 25 °C. What is the totalpressure 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

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