POSSIBLE POINTS 12.5 The earth is about 150,000,000 km from the Sun. Express this number is scientific notation.
O 15 x 108
O 15 x 10
O 15x10-8
15 x 107

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.