Which Set of Gases Is Listed from Highest to Lowest

question 5

Multiple Choice

Which set of gases is listed from highest to lowest root-mean-square speed at 25°C?

• A) Kr > CO₂ > NO₂ > SF₆
• B) SF₆ > NO₂ > CO₂ > Kr
• C) SF₆ > Kr > CO₂ > NO₂
• D) SF₆ > Kr > NO₂ > CO₂
• E) CO₂ > NO₂ > Kr > SF₆

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