For every 1.0 mole of glycine in the sample, how many molecules of methionine are present? (for performing calculations with numbers expressed in scientific notation, try this exercise.)

1.08 X 10^21 molecules

answer: i would say b.

explanation:

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.