Chemistry

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.

Mole Concept

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Answer

No. of atoms in 12 g C = 6.022 × 10²³

∴ no. of carbon atoms in 10^-12 g

$\dfrac{6.022 \times 10^{23}}{12}$ x 10^-12

= 5.019 × 10¹⁰ atoms

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