Why did modern's say atoms are divisible

100mg magnesium reacts with 20ml of 1.0m hcl

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%

The boiling point of liquids is very high what does it indicate