Elements in Products

Question 1

How can the same elements make different substances?

Answer 1

different amount of the same elements can make different substances:

Example:
- Cetyl Alcohol and Alcohol denat both have hydrogen, carbon, and oxygen; but they are different substances because of the amount of carbon, hydrogen, and oxygen they contian

Question 2

what are a lot of substances made out of

Answer 2

carbon, hydrogen, and oxygen (oxygen is the most common)