4. When the following reaction is at equilibrium, which of these relationships is always true? 2O3(g) 3O2(g)
a. [O3] / [O2]
b. [O3]2/ [O2]3
c. Kc=[O3]2/ [O2]3
d. Kc= [O2]3 /[O3]2

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.