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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
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

Effusion

General Chemistry

7. Gases

Effusion

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Multiple Choice

If NO₂ and NH₃ are allowed to effuse through a porous membrane under identical conditions, the rate of effusion for NH₃ will be how many times that of NO₂?

1.5

2.0

0.8

1.6

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Verified step by step guidance

Begin by understanding Graham's Law of Effusion, which states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass. This can be expressed as:

\frac{r_{1}}{r_{2}} = \sqrt{\frac{M_{2}}{M_{1}}}

, where r1 and r2 are the rates of effusion and M1 and M2 are the molar masses of the gases.

Identify the molar masses of NO₂ and NH₃. NO₂ has a molar mass of approximately 46 g/mol, and NH₃ has a molar mass of approximately 17 g/mol.

Apply Graham's Law to find the ratio of the effusion rates. Substitute the molar masses into the formula:

\frac{r_{NH₃}}{r_{NO₂}} = \sqrt{\frac{46}{17}}

Calculate the square root of the ratio of the molar masses:

\sqrt{\frac{46}{17}}

. This will give you the factor by which the rate of effusion of NH₃ is greater than that of NO₂.

Interpret the result to determine how many times faster NH₃ effuses compared to NO₂ under identical conditions. This will help you choose the correct answer from the given options.