Lithium has only two naturally occurring isotopes. the mass of li-6 is 6.015 amu and the mass of li-7 is 7.016 amu. the average atomic mass of lithium is 6.941. (a) calculate the relative abundances of the two isotopes. (b) what fraction of a sample of lithium atoms actually has a mass of 6.941 amu
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Lithium has only two naturally occurring isotopes. the mass of li-6 is 6.015 amu and the mass of li-...
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