Chemistry, 13.10.2020 05:01, cschellfamily

An unknown element has 2 naturally occurring isotopes. The first isotope has an atomic mass of 84.9117 and the second isotope has an atomic mass of 86.909. Their abundances are 72.2% and 27.8% respectively. Answer Choices: 85.56 86.44 85.21 86.00

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An unknown element has 2 naturally occurring isotopes. The first isotope has an atomic mass of 84.91...