What is the oxidation state of cl in hclo4?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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 gas called? identify which way they are transitioning