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What is the average atomic mass of an element with isotopes a b and c?

User Jonan
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amm=(%of a × mass of a + %of b ×mass of b +%of c × mass of c)/100
User Ilyes Kooli
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Answer:

Average Atomic Mass of the Isotope = [ Percentage of a in mass spectrum x corresponding atomic mass of a + Percentage of b in mass spectrum x corresponding atomic mass of b + Percentage of c in mass spectrum x corresponding atomic mass of c ]

User Attila
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