The answer would be the amino group and the carboxyl group
hope this helpssss
They react to form salt ZnCl + hydrogen gas
This is a reduction half-reaction. Initially, gold exists as

, and after the reaction, it has been converted to elemental gold. To make this possible, three electrons must be added to <span>

. This fits within the definition of reduction reactions, where the reactant gains electrons in the reaction.</span>
Answer:
the answer is D i believe. i am not shure but im like 70% sure