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

Question

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

Quizplus · Accepted Answer

To calculate the atomic mass of tungsten, we need to multiply the atomic mass of each isotope by its relative abundance (in decimal form) and then add up the products.

(179.9467 amu)(0.0012) + (181.9482 amu)(0.2650) + (182.9502 amu)(0.1431) + (183.9509 amu)(0.3064) + (185.9544 amu)(0.2843) =  183.84 amu

Therefore, the atomic mass of tungsten is 183.84 amu.

Calculate the Atomic Mass of Tungsten Given the Atomic Mass