I need help with these questions fast plz no links

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%

How does a hydroelectric power plant converts energy into energy.

Based on its chemical properties, identify the position of each chemical family on the periodic table.