An element has three isotopes. The first two have masses 19….
Questions
An element hаs three isоtоpes. The first twо hаve mаsses 19.9924 u and 20.9938 u with abundances 90.48% and 0.27%. The third isotope has abundance 9.25%. If the average atomic mass is {avg} u, calculate the mass of the third isotope.
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