The lead in lead pencils is actually almost carbon and the mass of a period mark

Chemistry
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The lead in lead pencils is actually almost carbon and the mass of a period mark made by a lead pencil is about 0.0001gms how many carbon atoms are there

Nov 13th, 2014

answer 5*10 to the power 18

Nov 13th, 2014

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Nov 13th, 2014
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Nov 13th, 2014
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