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Question

If one mole of carbon atoms weighs 12grams, what is the mass (in grams) of 1 atom of carbon?


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Solution

Calculating the mass of the Carbon atom

It is given that 1 mole of carbon atoms weighs 12grams.

Also in 1 mole of carbon atoms, there are Avogadro's number of atoms that 6.022×1023atoms

If 6.022×1023atoms weight 12 grams

1 carbon atom will weigh

126.022×1023=1.99×10-23g2×10-23g

Therefore, the mass (in grams) of 1 atom of carbon is 2×10-23g.


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