What states that matter is never created or destroyed?

Motivation cannot be developed with practice; a person either possesses it or they do not.

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

What are transitions between a liquid and a solid called? identify which way they are transitioning