Problem: Use the mass spectrum of rubidium to determine the atomic mass of rubidium.

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Atomic Mass=(mass×f.a.)isotope 1 +(mass×f.a.)isotope 2

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Use the mass spectrum of rubidium to determine the atomic mass of rubidium.

Mass spectrum of rubidium with percent intensity on the vertical axis and mass (amu) on the horizontal axis. The spectrum includes the percent intensities of two isotopes of rubidium, Rb-85 with a peak intensity of 100%, and Rb-87 with a peak intensity of about 40%.


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