Carbon has the following three isotopes with relative abundances and masses (amu) shown in the table.
Isotope Relative abundance(%) Atomic mass(amu)
$12_{C}$ 98.892 12
$13_{C}$ 1.108 13.00335
$14_{C}$ $2 \times 10^{- 10}$ 14.00317
On the basis of above data, the average atomic mass of carbon will be

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12.000 u

12.011 u

12.015 u

13.000 u

answer is B.

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Detailed Solution

From the given data in question the average atomic mass of carbon will come out to be (0.98892) (12 u) + (0.01108) (13.00335 u) + ( $2 \times 10^{- 12}$ )(14.00317 u) = l2.011 u

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