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Copper Pennies Research Paper

452 Words2 Pages

Traveling from the U.S. mint into the hands, pockets, and wallets of citizens, ultimately, pennies will develop a dirty look due to daily interactions with their surroundings. In recent years, many have discovered possible solutions to restore the original shine of copper pennies. In order to determine what solution most effectively sterilizes our common pocket money, it is crucial to understand what makes pennies dull in the first place and what can counter this reaction. Over time, pennies receive a dark coating, creating a dull appearance. This tarnish is a compound labeled copper oxide. The copper atoms of pennies react with oxygen in the air, forming copper oxide molecules (Pflugfelder). Protecting the metal beneath, the layer of copper

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