Calculate the energy in joules and calories required to heat 25.0 g of water from 12.5c to 25.7c

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

In 2002, the rare earth elements mine in mountain pass, california was closed because