Limestone(CaCO3) is used to remove acidic pollutants from smoke stack flue gases. It is heated to form lime(CaO), which reactswith sulfur dioxide to form calcium sulfite. Assuning a 70.%yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of8.5x104kg of coal that is 0.33 mass% sulfur?