the point given as full stop at the end of a sentence by a graphite pencil weighs 2× 10^-12g. how many carbon atoms are present in such a point
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12g of C contains 6.022 x 10^23 C atoms
1g C contains 6.022 x 10^23/12 C atoms
2 x 10^-12 g C contains
(6.022 x 10^23)(2 x 10^-12)/12 C atoms
=1.003 x 10^11 C atoms
Hope it helps.
12g of C contains 6.022 x 10^23 C atoms
1g C contains 6.022 x 10^23/12 C atoms
2 x 10^-12 g C contains
(6.022 x 10^23)(2 x 10^-12)/12 C atoms
=1.003 x 10^11 C atoms
Hope it helps.
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