The mass of one dot(.) written with a pure graphite pencil is 10 to the power minus 6 gram calculate the number of carbon atoms required to write such a dot.
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Explanation:
the mass of one dot written with pure graphite pencil=10^-6.
we have to find no. of carbon atoms in that dot
mass of dot=10^-6.
1 mole of carbon=12g
1 mole of carbon=6.022*10^23 atoms.
therefore,
12g of carbon has 6.022*10^23 atoms
1g = 6.022*10^23/12
10^-6=6.022*10^23/12 *10^-6
=6.022*10^17/12
=0.5018*10^17
therefore in one dot of graphite of mass 10^17 has 0.5018*10^17 number of atoms
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