Hypothetical element X has 3 stable isotopes. The relative peak intensities are 47.91 for 180.0 u, 100.0 for 184.0 u, and 63.44 for 186.0 u. What is the average atomic mass for X? USE THE CORRECT NUMBER OF SIG. FIG. Answer:

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Q: mass е relative (amu) abundance 111.9 90.3% 118.9 9.7%

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