What is the total number of sulfur atoms in Mg2(SO4)3

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%

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

All cells are made of four types of acids, lipids, proteins, and carbohydrates.