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what is the chemical formula of a penny? ________________________________________________________________________ Wow, you're a gord. Pennies are interesting things. If they're pre-1982, they're primarily composed of Copper (Cu). However, pennies since then are made of Zinc (Zn) and coated with Copper. source: http://coins.about.com/od/uscoins/f/copper_to_zinc.htm and http://answers.Yahoo.com/question/index?qid=20080509170406AAZirK2

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