Someone. i would really appreciate it a newly discovered element, x, has two naturally occurring isotopes. 93.5 percent of the sample is an isotope with a mass of 268.9 u, and 6.5 percent of the sample is an isotope with a mass of 269.9 u. what is the weighted average atomic mass for this element?
268.5 u
269.0 u
269.8 u
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