how many number copper atom in 0.635gram
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Number of moles in 0.635g of copper=0.63563.50.63563.5
⇒0.01⇒0.01
Number of copper atoms in 0.01 moles =0.01×6.02×10230.01×6.02×1023
⇒6.02×1021⇒6.02×1021
⇒0.01⇒0.01
Number of copper atoms in 0.01 moles =0.01×6.02×10230.01×6.02×1023
⇒6.02×1021⇒6.02×1021
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