2) An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu, and the other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element? A) 186.956 amu B) 185.702 amu C) 186.207 amu D) 185.954 amu

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ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding
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12) An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic
mass of 184.953 amu, and the other has an abundance of 62.6% and a mass of 186.956 amu. What
is the atomic weight of the element?
A) 186.956 amu
B) 185.702 amu
C) 186.207 amu
D) 185.954 amu
Transcribed Image Text:12) An element has two naturally occurring isotopes. One has an abundance of 37.4% and an isotopic mass of 184.953 amu, and the other has an abundance of 62.6% and a mass of 186.956 amu. What is the atomic weight of the element? A) 186.956 amu B) 185.702 amu C) 186.207 amu D) 185.954 amu
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