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Using the reaction quotient

Problem

2NHA3(g)NA2(g)+3HA2(g)
At 680 K, 0.40 mol each of the three gases in the reaction represented above are placed in an evacuated, rigid 1.0 L container. The value of Kc for the reaction at 680 K is 0.62.
At equilibrium, which of the gases will have the highest concentration?
Choose 1 answer: