Consider the following addition. How many significant figures should be in the final answer? 12.10 mL
+ 10.00 mL

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.

distance, luminosity, brightness, radius, chemical composition, and temperature

my dad did alot of meth and ace cheeks