When an organic acid is mixed with an alcohol, the reaction is reversible and produces an ester together with water. $0.40\,\text{mol}$ of an organic acid and $0.30\,\text{mol}$ of an alcohol are then combined and left at $25^\circ\text{C}$ until equilibrium is achieved. At equilibrium, $0.20\,\text{mol}$ of ester has formed. Calculate the equilibrium constant, $K_c$, for the conditions used?
- A0.33
- B0.50
- C2.0
- D10