Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 36m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

7. Gases

Pressure Units

General Chemistry

7. Gases

Pressure Units

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Multiple Choice

Which of the following correctly ranks the pressure units from smallest to largest?

1 Pa, 1 psi, 1 mmHg, 1 torr, 1 atm

1 Pa, 1 atm, 1 psi, 1 mmHg, 1 torr

1 Pa, 1 torr, 1 mmHg, 1 psi, 1 atm

1 Pa, 1 mmHg, 1 torr, 1 psi, 1 atm

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Verified step by step guidance

Understand the units of pressure: Pascal (Pa), pounds per square inch (psi), millimeters of mercury (mmHg), torr, and atmosphere (atm). These are all units used to measure pressure, but they have different magnitudes.

Recall the conversion factors between these units: 1 atm = 101325 Pa, 1 atm = 760 mmHg, 1 atm = 760 torr, 1 atm = 14.696 psi.

Convert each unit to a common unit, such as atmospheres, to compare their magnitudes. For example, 1 Pa is much smaller than 1 atm, while 1 psi is approximately 0.068 atm.

Rank the units based on their converted values: Start with the smallest value and proceed to the largest. This involves comparing the converted values of each unit.

Verify the ranking by checking the conversion factors again to ensure accuracy. The correct order should be from the smallest unit to the largest unit based on their pressure values.