Electrons
although the conventional current is actually assumed to be a bunch of positive particles moving in the opposite direction
I should think that Yolanda should use litmus paper throughout the reaction as its color will tell when the mixture is neutral and therefore then, when she can stop adding either the hydrochloric acid or the sodium hydroxide or if one or the other needs to be added to make the solution approach neutral. Blue litmus paper stays blue in a neutral solution, but will turn red in an acidic solution.
If there are 4 molecules of glucose, there will be 24 carbon, 48 hydrogen, and 24 oxygen.
