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

Question

Carbon has the following three isotopes with relative abundances and masses (amu) shown in the table. Isotopes Relative abundance ( %) Atomic mass (amu) 12 C 98.892 12 13 C 1.108 13.00335 14 C 2 × 10-10 14.00317 On the basis of above data, the average atomic mass of carbon will be (A) 12.000 u (B) 12.011 u (C) 12.015 u (D) 13.000 u

Tardigrade Admin · Accepted Answer

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 × 10-12)(14.00317 u ) =12.011 u

Isotopes	Relative abundance $(%)$	Atomic mass (amu)
$^{12} C$	$98.892$	$12$
$^{13} C$	$1.108$	$13.00335$
$^{14} C$	$2 \times 1 0^{- 10}$	$14.00317$

$12.000 u$

$12.011 u$

$12.015 u$

$13.000 u$

From the given data in question, the average atomic mass of carbon will come out to be
$(0.98892) (12 u) + (0.01108) (13.00335 u) + (2 \times 1 0^{- 12}) (14.00317 u)$
$= 12.011 u$

Q. Carbon has the following three isotopes with relative abundances and masses (amu) shown in the table. Isotopes Relative abundance (%) Atomic mass (amu) 12C 98.892 12 13C 1.108 13.00335 14C 2×10−10 14.00317 On the basis of above data, the average atomic mass of carbon will be

12.000u

12.011u

12.015u

13.000u

From the given data in question, the average atomic mass of carbon will come out to be (0.98892)(12u)+(0.01108)(13.00335u)+(2×10−12)(14.00317u) =12.011u

$12.000 u$

$12.011 u$

$12.015 u$

$13.000 u$

From the given data in question, the average atomic mass of carbon will come out to be
$(0.98892) (12 u) + (0.01108) (13.00335 u) + (2 \times 1 0^{- 12}) (14.00317 u)$
$= 12.011 u$