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Topic 1.2 · Mass Spectra of Elements

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AP Chemistry · Topic 1.2: Mass Spectra of ElementsOpen topic

Practice question

Original PrepAtlas question. This is not an official College Board question.

A single-element mass spectrum contains only singly charged monatomic ions with approximate isotopic masses20 u and22 u. Their abundances are90.0% and10.0%. What is the average atomic mass?
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