Exam 3 Practice

To what temperature must a balloon, initially at 25∘C and 2.00 L, be heated in order to have a volume of 6.00 L?

993K

403K

75K

894K

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K, at constant amount of gas and volume?

1.5atm

.94atm

.47atm

2.1atm

A sample of helium gas at 27.0 °C and 3.60 atm pressure is cooled in the same container to a temperature of -73.0 °C. What is the new pressure, if volume and amount of gas do not change?A sample of helium gas at 27.0 °C and 3.60 atm pressure is cooled in the same container to a temperature of -73.0 °C. What is the new pressure, if volume and amount of gas do not change?

3.12atm

2.40atm

5.40atm

2.38atm

At 570. mm Hg and 25 °C, a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of 175 °C, if the amount of gas does not change?

1560 mmHg

210. mmHg

700. mmHg

690. mmHg

A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a temperature of 25 °C. What was the new volume of the gas when the temperature was changed to 50. °C and the new pressure was 760 torr, if the amount of gas does not change?

530 mL

450 mL

970 mL

240 mL

At STP, what is the volume of 4.50 moles of nitrogen gas?

167 L

3420 L

101 L

60.7 L

What is the pressure, in mmHg, of a 4.00 g sample of O2 gas, which has a temperature of 30.0 °C, and a volume of 3.00 L?

0.788 mmHg

78.0 mmHg

7880 mmHg

788 mmHg

According to the kinetic theory of gases, particles of a gas...

Are very large.

Are very far apart.

Move slowly

Lose their valence electrons

The volume of a sample of gas, initially at 25 °C and 158 mL, increases to 450. mL. What is the final temperature of the sample of gas, if the pressure and amount of gas in the container is kept constant?

8.8 °C

71 °C

105 °C

576 °C

Exam 3 Practice

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