Striking it rich Lab

1. The untreated coins color is the same copper red color; the one that was heated turned goldish yellow, and the one that was only put in the zinc chloride turned silver with the same tarnish but less color.
2. Yes the coins contain zinc, which is what the copper is combined with when it is heated, to produce brass
3. The color looks more valuable, it could be more stable now that is it combined with zinc.
4. The copper atom combined with zinc to create brass
1. Yes you can combine it with something more reactive than zinc or copper.