Which of the following is an example of a chemical reaction? A) Metal rusts slowly when it is exposed to water.

B) Water vapor in clouds turns into snow.

C) Salt dissolves in water until it is no longer visible.

I would choose A) Metal rusts slowly when it is exposed to water.

Explanation:

The reason why is because rust is a new substance made by two other substances (iron and oxygen)

the answer is c i took the test

answersilicon (si); oxygen (o);