Chemistry, 05.09.2020 06:01, nerogravestones

An element has the following natural abundances and isotopic masses: 90.47% abundance with 19.98 amu, 0.28% abundance with 20.98 amu, and 9.26% abundance with 22.00 amu. Calculate the average atomic mass of this element. (Enter an unrounded value.)

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An element has the following natural abundances and isotopic masses: 90.47% abundance with 19.98 amu...