# A Student Puts His Signature with Graphite Pencil. If the Mass of Carbon in the Signature is 10-12 G. Calculate the Number of Carbon Atoms in the Signature. - Chemistry

Sum

A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g. Calculate the number of carbon atoms in the signature.

#### Solution

12g of carbon contains = 6.023 x 1023 number of carbon atoms.
10-12g of carbon will contain = (6.023 xx 10^23 xx 10^(-12))/12
= 0.5019 x 1011
= 5.019 x 1010
So,the number of carbon atoms in the signature is 5.019 x 1010

Concept: Mole Concept
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#### APPEARS IN

Frank ICSE Class 10 Chemistry Part 2
Chapter 5 Mole Concept And Stoichiometry
Exercise | Q 16 | Page 116