Your answer on this question is B
[H3O+] = 10^-pH.
[H3O+] = 10^(-2,5) = 0,0032 moles/dm3
The correct word to fill the blank in the sentence is "capillaries". The thinnest blood vessels in your body are the capillaries. These are the blood vessels that blood is able to transfer sugars and oxygen into the tissues.
