Answer
(Isotopic Mass of Eu-151)(Abundance of Eu-151) + (Isotopic Mass of Eu-153) (Abundance of Eu-153) = Atomic Mass of Eu
Suppose x = Abundance of Eu-151
This implies that Abundance of Eu-153= 1-x
Therefore
(150.9199)(x) + (152.9212)(1-x) = 151.964
150.9199x + 152.9212 – 152.9212x = 151.964
2.0013x = -0.9572
x = 0.4783
1 – x = 1 – 0.4783
= 0.5217
Abundance of Eu-151= 47.83 %
Abundance of Eu-153= 52.17%
Work Step by Step
As given in answer
