Water flows into and out of a 5 liter tank at a rate of 1 L/min. Within the tank, the mineral apatite is dissolving at a rate of 3x10^-10 moles of Si per m^2 per sec. If the tank contains 10g of the apatite with a specific surface area of 2 m^2/g, what is the steady state effluent concentration of Si.