When sulfuric acid is a component of polluted air it chemically attacks statues

When sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from limestone. Given that the most common mineral in limestone is calcium carbonate describe how these limestone objects are corroded by the sulfuric acid in polluted air. What chemical reaction is involved here?Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. a. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3? Show your solution.b. Discuss at least three potentially hazardous features associated with concentrated sulfuric acid.