Which of these changes absorbs heat? O A. Burning a candle
O B. Freezing ice cream
C. Running in a race
O D. Roasting vegetables

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.

i'm pretty sure its b i might be wrong though!

explanation:

0.07 g/cm³

1.37 g/cm³