Which of the following is always true for a reaction where Kc is at 25°C?
a. The reaction mixture contains mostly products at equilibrium.
b. The reaction mixture contains mostly reactants at equilibrium.
c. The rate of reaction is very fast.
d. There are approximately equal moles of reactants and products at equilibrium.
e. Both A and C.
Answer: a. The reaction mixture contains mostly products at equilibrium.