Chemistry, 16.07.2019 00:10 aprilpendergrass
Anewly discovered element, y, has two naturally occurring isotopes. 87.8 percent of the sample is an isotope with a mass of 267.8 u, and 12.2 percent of the sample is an isotope with a mass of 269.9 u. what is the weighted average atomic mass for this element? 267.9 u 268.1 u 268.9 u 269.1 u
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