Here's why:
* Kinetic Molecular Theory: The speed of gas molecules is directly related to their temperature. The higher the temperature, the faster the molecules move.
* Molecular Mass: Lighter molecules move faster than heavier ones at the same temperature.
To determine the fastest moving gas molecule, you would need to:
1. Know the temperature: The higher the temperature, the faster all the molecules will move.
2. Consider the molecular mass: Lighter molecules like hydrogen (H₂) will generally move faster than heavier molecules like oxygen (O₂).
Example:
At a given temperature, hydrogen gas (H₂) will be the fastest moving because it has the lowest molecular mass. However, if you raise the temperature of a heavier gas like xenon (Xe), it could potentially move faster than hydrogen at a lower temperature.
Key takeaway: The fastest moving gas molecule depends on both temperature and molecular mass.
