The reversible reaction A(g) ⇌ B(g) has K_c = 1.5 at a certain temperature. Four sealed, identical containers (I–IV) each hold 10 total gas particles in the following compositions.
Container I : 6 A and 4 B
Container II : 4 A and 6 B
Container III : 3 A and 7 B
Container IV : 2 A and 8 B
Which container is at (or closest to) equilibrium?
a) Container III
b) Container II
c) Container I
d) Container IV