During a certain time period, 4.0 million tons of SO2 were released into the atmosphere and subsequently oxidized to SO3. As explained in the Inquiry, the acid rain produced when the SO3 dissolves in water can damage marble statues: CaCO31s2 + H2SO41aq2S CaSO41aq2 + CO21g2 + H2O1l2 (b) How many liters of CO2 gas at 20 °C and 735 mm Hg is produced as a byproduct?.