B. Left (toward (N_2O_4)).
A common misconception is that equilibrium means the reactions have stopped. The Gizmo combats this by showing continuous movement (shuttling back and forth) even when the bars representing concentration remain level. Assessment questions often test this distinction, asking students to identify whether a system is static or dynamic.
A : The balance will increase. Q: What happens if you spend exactly as much as you save?
If you share a from the assessment (without copying the whole answer key), I can explain the science behind it step-by-step so you can find the right answer yourself. Would that help?