Please help I dont know what the answers are, In a chemical reaction, atoms and molecules rearrange to form new substances. Substances that undergo chemical changes are called and what they are formed are called .

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

List the path of the respiratory system

What happens to the temperature of a substance when the average kinetic energy of its particles increases?