What type of reaction FeO + SO3 → FeSO4

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Ihat will happen if i added baking soda to vinegar

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%