True or false, The universal gas constant, R, is . 0821 when we use mm Hg as our unit for pressure

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

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Who discovered a pattern to the elements in 1869?