Describe the ways you can know that a chemical reaction has occurred. enter your answer in the space provided.

A chemical reaction is one in which rearrangement of atoms take place. A chemical reaction is characterized by following changes:

1) Absorption or release of heat. Example: Combustion reaction

2) formation of gas bubbles

3) Formation of precipitate

4) Change in color

Colorless changes to white

answer; i believe the correct answer is (solid gold);

the answer to your question is c.

if you read the house of usher you should know that the house was haunted