AP Chemistry Question of the Day --10

Here comes the answer to question 9 I posted yesterday. The correct answer is D. 
Average kinetic energy of any substance is only dependent on the temperature. Temperature  is the measure of average kinetic energy of atoms and molecules.

Following is Question 10 of the series. It is in continuation with Question 9. 

10. Three gases are kept in three identical rigid containers under the conditions given in the table below, which one has the greatest density?

A. gas A

B. gas B

C. gas C

D. Their average kinetic energy are the same

I will post the answer and explanation tomorrow.

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