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OpenStudy (anonymous):
If the penny is 5% zinc, how many zinc atoms are in the penny?
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OpenStudy (greatlife44):
You need to find the weight of the penny and then multiply it by .05 to get the mass in grams.
OpenStudy (greatlife44):
But this is only the first step because afterwards you need to find how many atoms. Tell me what you get from this step.
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