The creation of shells by mollusk species is a fascinating process. By utilizing the Ca2+ in their food and aqueous environment, as well as some complex equilibrium processes, a hard calcium carbonate shell can be produced. One important equilibrium reaction in this complex process is as follows. HCO3−(aq) equilibrium reaction arrow H +(aq) + CO32−(aq) K = 5.6 ✕ 10−11 If 0.15 mole of HCO3− is placed into 1.00 L of solution, what will be the equilibrium concentration (in M) of CO32−?