What is the name of this molecule? A. cis-2-pentene B. 2-pentyne C. 2-methylpentane D. Pentane

Im sure its 2-Pentyne

So B. 2-Pentyne is the right answer

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.