4. What gives blood its red color? a. hemoglobin
O
b. red blood cells
O
c. platelets
d. plasma

the best answer would be A

Explanation:

cause it contains a red colored compound.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

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.