Calculate the fraction of atom sites that are vacant for copper (cu) at a temperature of 754°c (1027 k). assume an energy for vacancy formation of 0.90 ev/atom.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

c. 75.7

i think that is the right