Sulfur dioxide (SO2) is an unwelcome result of burning soft coal in power plants. Some of the SO2 ends up as sulfuric acid in acid precipitation. The net reaction is 2 SO2(g) + O2(g) + 2H2O -> 2H2SO4 What mass in grams of SO2 is needed to react with 1511 g of O2? Answer in units of g