Chemistry

This problem tests your understanding of how $Q$ (reaction quotient) relates to equilibrium position. When a system contains much more product than reactant, it's already close to or at equilibrium—and at equilibrium, $Q = K$. Since the problem tells us products dominate, the equilibrium constant $K$ must be large, which means $Q$ at this moment must also be large. The key insight: $Q > K$ would push the reaction backward, while $Q < K$ would push it forward; a high product ratio means $Q$ is already well above 1.

This problem tests your understanding of how $Q$ (reaction quotient) relates to equilibrium position. When a system contains much more product than reactant, it's already close to or at equilibrium—and at equilibrium, $Q = K$. Since the problem tells us products dominate, the equilibrium constant $K$ must be large, which means $Q$ at this moment must also be large. The key insight: $Q > K$ would push the reaction backward, while $Q < K$ would push it forward; a high product ratio means $Q$ is already well above 1.