Answer
Please see the work below.
Work Step by Step
The correct answer is D.
It is not true that the Ar atoms hit the walls of hte falsk with the greatest force of the three gases.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.