D) + ΔH and +ΔE
Given this is one of the answer choices
Because of the protons connected to the Nitrogen oxide group giving it its positive charge.
C can be the only correct answer - 6.023 x 10^23 is the amount of molecules in a mol of an element. 4.5 x 6.023 x 10^23 can not equal anything but C.
4.5 x 6.023 x 10^23 = 2.71035 x 10^24
The refractory period makes the cell rest. In this period, the cell becomes able to depolarize again by collecting ions.
