A naturally occurring sample of an element contains only two isotopes. The first isotope has a mass
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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. Find 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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