See explanation below.
Work Step by Step
Scene A represents: A equilibrium concentration or pressure that does not change with the addition of species. Therefore, at equilibrium, X should have aprox. 3 spheres.
You can help us out by revising, improving and updating this answer.Update this answer
After 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.