Assume That the Reaction Quotient, Q_c, for the Following Reaction

Multiple Choice

Assume that the reaction quotient, Q_c, for the following reaction at 25°C is 1.0 x 10^-8
2 NO₂(g) 2 NO(g) + O₂(g)     K_c = 7.4 x 10^-16 (at 25°C)
From this we can conclude:

A) The reaction is at equilibrium.
B) Equilibrium could be reached by adding enough NO or O₂ to the system.
C) The reaction must proceed from left to right to reach equilibrium.
D) The reaction must proceed from right to left to reach equilibrium.
E) The reaction can never reach equilibrium.