Question

21)
An Ozone molecule contain
oxygen atoms.
22)
Digestion of food is a
change.​

Answer 1

Answer:

Chemical digestion is considered a chemical change because enzymes in the stomach and intestines break down large macromolecules into simpler molecules so that the body can more easily absorb the food.

Answer 2

Answer:

21. O2 + [O] =O3

22. Digestion is that life process in which complex food molecules break down into simpler and absorable form.