30-10-2020
Chemistry

contestada

Element X has 2 naturally occurring isotopes. The first isotope has an atomic mass of 44.009 amu and it’s percent abundance is 33%. The second isotope has an atomic mass of 40.5 amu and it’s percent abundance is 67%. What is the atomic mass of Element X

A 39.99 amu
B 39.91 amu
C 40.42 amu
D 41.66 amu

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Carinariver Carinariver

09-11-2020

Answer:D, 41.66

Explanation:subtract 33 from 100 to get 66 then multiply the percentages with the amu

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