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[" 81) A signature,written in carbon pen...

[" 81) A signature,written in carbon pencil "],[" weights "1mg." What is the number of "],[" carbon atoms present in the signature? "],[" 1) "5.02times10^(23)],[" 2) "5.02times10^(20)],[" 3) "6.02times10^(20)],[" 4) "0.502times10^(20)]

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