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  4. Number of carbon atoms given by a young man to his bride to be, if the engagement ring contains 0.50 carat diamond (1 carat = 200 mg) is

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Q. Number of carbon atoms given by a young man to his bride to be, if the engagement ring contains $0.50$ carat diamond ($1$ carat $= 200 \,mg$) is

Some Basic Concepts of Chemistry

Solution:

$1$ carat $= 200 \,mg = 0.2\, g$
$0.5$ carat $= 0.1\, g$
$12\, g$ of carbon $= 6.023 \times 10^{23}$ atoms,
$0.1\, g$ of carbon $= \frac{6.023\,\times\,10^{23}}{12} \times 0.1$