Calculating Average Atomic Mass
An element has three isotopes with masses of 142.1 amu, 143.1 amu, and 144.1 amu. The mass spectrum of the element shows relative peak intensities in a 2:3:1 ratio for these isotopes, respectively. What is the average atomic mass of the element?
A
143.4 amu
B
143.1 amu
C
142.9 amu
D
143.0 amu
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