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Practice Problem 12.2

Practice Problem 12.2. Effusion of an unknown gas Before you begin make sure the problem is printed out and in front of you. The Question. An unknown gas is found to effuse at a rate that is 1.864 times faster than Br 2 at the same temperature. What is the identity of the gas? Cl 2 Ar NO 2

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Practice Problem 12.2

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  1. Practice Problem 12.2 Effusion of an unknown gas Before you begin make sure the problem is printed out and in front of you.

  2. The Question An unknown gas is found to effuse at a rate that is 1.864 times faster than Br2 at the same temperature. What is the identity of the gas? • Cl2 • Ar • NO2 • CH4 • O2

  3. Concepts An unknown gas is found to effuse at a rate that is 1.864 times faster than Br2 at the same temperature. What is the identity of the gas?

  4. Connections • What is given? • The relationship between the two gases’ effusion rates. • What do I want to know? • The identity of the unknown gas • What else do I need to know? • What is effusion?

  5. What is effusion?

  6. How does effusion relate to two gases?

  7. Summarize your Information…THEN solve rate of effusion of unknown = Rearranging this becomes Graham's Law tells us that the ratio of the rates is related to the molar masses of the gases:

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