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OpenStudy (annipuppi):
What should happen if you file off the copper coating on a zinc penny and place it in vinegar for 30 minutes? It's homework and I don't have the vinegar to actually complete the experiment so I need to know what the penny would look like after 30 minutes.
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OpenStudy (anonymous):
he vinegar dissolves the dull cupric oxide, leaving behind pennies with a shiny clean copper surfac
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