Final answer:
The average net charge of glycine at pH 2.34 is zero due to its isoelectric pH.
Step-by-step explanation:
The average net charge of glycine at pH 2.34 can be determined by considering its isoelectric pH. The isoelectric pH is the pH at which the positive charge on the amino acid is equal to the negative charges, resulting in a net charge of zero. At this pH, glycine exists in its zwitterion form, where the amino group is protonated (+NH3) and the carboxyl group is deprotonated (-COO-).