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Solved All measurements on this lab report must include
2018 U.S. Copper Penny: 579,100 ppm Zinc & 419,200 ppm Copper
Dissolving Pennies – Science On
The penny may be worthless, but let's keep it anyway
L.A. PARKER: Life without pennies no longer a dream as final seven
Clovis Civic Center - A saying goes, Find a penny, pick it up
Mine Tales: Mining metals from pocket change
Solved Part A An American penny is 97.5% zinc and 2.5%
Why are US coins made out of metals like copper and nickel? - Quora
1994 Penny Coin Value (Errors List, D, S & No Mint Mark Worth)
Memorial cent was big deal in 1959 - Numismatic News
Separating Copper and Zinc from a Penny - HubPages