Consider a box model for an air shed over a city with 10,000 m on each side and a mixing depth of 200 m. Winds with no SO2 blow at 2 m/s against one side of the box. SO2 is emitted in the box at the rate of 20 kg/s (this is the same as the earlier problem). Now considering that SO2 is not conservative and in fact has a reactivity of 0.72/hr, estimate its steady state concentration Group of answer choices