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How many atoms are in a penny?

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(1 amu = - Have all my HW correct but this one. Not asking for an answer but can someone wa read more

A pure copper penny contains approximately 3.0*10^22 copper atoms. 1- How many dozens of copper atoms are in a penny. 2- How many gross of copper atoms are in a penny. 3- How many reams of copper atoms are in a penny. 4- How many moles of copper atoms are in a penny. read more

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