Write the name and molecular formula of salts that bring temporary and permanent hardness in water.

Deposition is the transition of matter going from gas to solid without passing through the liquid phase.a.) gas—-> solid

"electrical energy" transforms to "thermal energy".hope my answer has you : )

The correct answer to this question is 28 

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).