1. The zinc inside the penny reacts with acetic acid (CH3COOH). The products are zinc acetate and hydrogen gas. Write out the balanced chemical reaction of zinc with acetic acid using states (i.e. s, g, l, and aq).

2. The zinc/acetic acid reaction is a redox reaction. Assign oxidation numbers to the zinc (before and after it reacts), the acidic hydrogen of acetic acid (underlined in the above formula and to hydrogen gas.