An artifact contains 1/4 as much carbon-14 as the atmosphere. how old is the artifact

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 is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

What are the two largest greenhouse gases