Test - Chemical Reaction

Question 1

18. A bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen is an example of a

Answer 1

Decomposition reaction p.9

Question 2

19. In a chemical equation, numbers often appear in front of a chemical formula. These tell you the

Answer 2

Number of molecules or atoms of each substance in the equation p.4

Question 3

29. Which of these is not an example of a chemical change?

Answer 3

All are examples of chemical change p.6