A particular element found in nature exists as two stable isotopes. 60.4% of the element has a mass of 68.9257amu, the rest of the element is found with a mass of 70.9249 amu. Calculate the average atomic mass of the element.

Question

anonymous · Answer

Amu 1 - 68.9257
Amu 1 percent abundance - 60.4%
Amu 2 - 70.9249
Amu 2 percent abundance would be (100%-60.4%)=?
since there are only 2 stable isotopes
(Amu 1)(Amu 1 percent abundance) + (Amu 2)(Amu 2 percent abundance)