What is the atomic mass of Torretite using the following data?

Tarretite-125: 125.22 amu 59.98 %
Torretite-300: 300.11 amu 40.02 %

1 answer

To find the atomic mass of Torretite, we need to calculate the weighted average of the atomic masses of Tarretite-125 and Torretite-300.

Atomic mass of Tarretite-125 = 125.22 amu
Percentage abundance of Tarretite-125 = 59.98%
Contribution to atomic mass = (125.22 amu x 59.98%) = 75.11 amu

Atomic mass of Torretite-300 = 300.11 amu
Percentage abundance of Torretite-300 = 40.02%
Contribution to atomic mass = (300.11 amu x 40.02%) = 120.10 amu

Total contribution to atomic mass = 75.11 amu + 120.10 amu = 195.21 amu

Therefore, the atomic mass of Torretite is 195.21 amu.