Chemistry, 11.10.2019 05:00 bbyniah123

Naturally occuring boron is 80.20% boron-11 (atomic mass 11.01 amu) and 19.80% of some other isotope. what must the atomic mass of this second isotope be in order to account for the 10.81 amu average atomic mass of boron? .

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Naturally occuring boron is 80.20% boron-11 (atomic mass 11.01 amu) and 19.80% of some other isotope...