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Please explain how you got the answer for this, for some reason I can not grasp...

Please explain how you got the answer for this, for some reason I can not grasp how to choose from those answer choices... BUT I do know how to get the Qc... Thanks so much for your help and please explain as simply as possible

For the reaction H2(g) + Br2(g)   2HBr(g), Kc = 81.4 at 385C. If [H2] = [Br2] = [HBr] = 2.4 10-4 M at 385C, which one of the following is correct? A. [H2] and [HBr] decreases as the system moves toward equilibrium. B. The system is at equilibrium. C. [H2] and [Br2] increases as the system approaches equilibrium. D. [HBr] increases as the system approaches equilibrium. E. [HBr] and [Br2] increases as the system approaches equilibrium.

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kc 81.4 8e uwaud diuucton the ans uuuu 〉, CHBo] muuau a thi system appluenchai eu d bsuum

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