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) + 2 H2O(l) —— 2 H2SO4(l)
 What mass in grams of SO2 is needed to
 react with 1771 g of O2?
 Answer in units of g.