Which element is oxidized in the reaction below? fe+2 + h+ + cr2o7-2 fe+3 + cr+3 + h2o?

Different isotopes indicate that an element will have different numbers of

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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