Rank the following substances in order of increasing average velocity, assuming they are all at the same temperature: O₂, CO₂, Ar, He A)O₂

Question

Rank the following substances in order of increasing average velocity, assuming they are all at the same temperature: O₂, CO₂, Ar, He A)O₂< CO₂< Ar < He B)CO₂< Ar < O₂< He C)Ar < O₂< CO₂< He D)CO₂< O₂ < Ar < He E)He < O₂< Ar < CO₂

Quizplus · Accepted Answer

The average velocity of gas molecules is inversely proportional to the square root of their molar mass. Therefore, lighter gases like He will have higher velocities than heavier gases like CO2.

Rank the Following Substances in Order of Increasing Average Velocity