Calculate the atomic mass of tungsten given the atomic mass and percent abundance for the following isotopes:
W-180 179.9467 u 0.12%
W-182 181.9482 u 26.50%
W-183 182.9502 u 14.31%
W-184 183.9509 u 30.64%
W-186 185.9544 u 28.43%
A) 183.75 u
B) 183.84 u
C) 182.98 u
D) 184.41 u
E) 183.92 u

Question

Calculate the atomic mass of tungsten given the atomic mass and percent abundance for the following isotopes: 
W-180 179.9467 u 0.12%
W-182 181.9482 u 26.50%
W-183 182.9502 u 14.31%
W-184 183.9509 u 30.64%
W-186 185.9544 u 28.43%
A) 183.75 u
B) 183.84 u
C) 182.98 u
D) 184.41 u
E) 183.92 u

Quizplus · Accepted Answer

The atomic mass is calculated by multiplying the mass of each isotope by its percent abundance (converted to a decimal), then summing these values: (179.9467 * 0.0012) + (181.9482 * 0.2650) + (182.9502 * 0.1431) + (183.9509 * 0.3064) + (185.9544 * 0.2843) = 183.84 u.

Calculate the Atomic Mass of Tungsten Given the Atomic Mass