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OpenStudy (anonymous):
Naturally occurring silicon has an atomic mass of 28.086 and consists of three isotopes. The major isotope is 28Si , natural abundance 92.23%, relative atomic mass 27.97693. The next most abundant isotope is 29Si , relative atomic mass 28.97649. The third isotope is 30Si whose natural abundance is in the ratio of 0.6592 to that of 29Si. Find the relative atomic mass of 30Si
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OpenStudy (aaronq):
You're finding the weighted average, so: \(Atomic\;mass_{relative}=\Sigma (mass_{isotope ^iSi}+\%Abundance_{isotope ^iSi})\)
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