Sample Problem 2.3
Calculating the Atomic Mass of an Element
PLAN:
Find the weighted average of the isotopic masses by multiplying each isotopic mass by its fractional abundance and summing the isotopic portions.
SOLUTION:
mass portion from 107Ag =
106.90509 amu x 0.5184 = 55.42 amu
mass portion from 109Ag = 108.90476 amu x 0.4816 = 52.45 amu
atomic mass of Ag = 55.42 amu + 52.45 amu = 107.87 amu
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