Chemistry, 01.07.2021 16:20 gizmo50245

An unknown element consists of two stable isotopes. The first has an atomic mass of 137.9068 amu and a percentage natural abundance of 0.09%. The second has an atomic mass of 138.9061 amu and a percentage natural abundance of 99.91%. What is the atomic mass of the element

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An unknown element consists of two stable isotopes. The first has an atomic mass of 137.9068 amu and...