NEED HELP WITH THIS CHEMISTRY QUESTION

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

I’m an electrically neutral atomic any element, there are equal numbers of

What is the average rate of the reaction between 10 and 20 s?