A hypothetical element consists of two isotopes of masses 69.95 amu and 71.95 amu with abundances of 25.7% and 74.3%,respectively.What is the average atomic mass of this element?
A) 70.95 amu
B) 69.95 amu
C) 70.5 amu
D) 71.4 amu
E) 71.95 amu
Correct Answer:
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