A Container Is Filled with a Mixture of Helium and Oxygen

question 12

Multiple Choice

A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22°C. Which gas molecules have the greater average kinetic energy?

• A)It is the same for both because the temperatures are the same.
• B)The oxygen molecules do because they are diatomic.
• C)The oxygen molecules do because they are more massive.
• D)The helium molecules do because they are less massive.
• E)The helium molecules do because they are monatomic.

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