A certain enriched sample of uranium was found to have the average atomic mass equal to 237.39 u. Assuming that it contains only two isotopes, 235U and 238U, find the abundance (in %) of 235U in that sample. The isotopic masses of 235U and 238U are 235.0439 u and 238.0508 u, respectively.

Which statement is best described as a atom

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 minerals found in bones are deposited by living cells called