A naturally occurring sample of an element contains only twoisotopes. The first isotope has a mass of 68.9255 amu and a naturalabundance of 60.11%. The second isotope has a mass of 70.9247amu. Determine the atomic mass of the element.a) 70.13 amu b) 69.72 amuc) 84.06 amu d) 69.93 amu

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ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding
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A naturally occurring sample of an element contains only two
isotopes. The first isotope has a mass of 68.9255 amu and a natural
abundance
of 60.11%. The second isotope has a mass of 70.9247
amu. Determine the atomic mass of the element.
a) 70.13 amu b) 69.72 amu
c) 84.06 amu d) 69.93 amu

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