Final answer:
The three rocks that most easily dissolve in water are limestone, gypsum, and rock salt.
Step-by-step explanation:
The three rocks that most easily dissolve in water are limestone, gypsum, and rock salt.
Limestone is primarily made up of the mineral calcite, which easily dissolves in water because of its high solubility. Gypsum is composed of the mineral gypsum, which is also highly soluble in water. Rock salt, or halite, is made up of the mineral halite, which readily dissolves in water.
These rocks dissolve in water as a result of the presence of certain minerals, their crystal structure, and the chemical reactions that occur between the minerals and water molecules.