Element X has 2 isotopes. One of the isotopes has a mass of 18.9 with an abundance of 75.4%. The second isotope with a mass of 20.2 and an abundance of 24.6%. Calculate the average Atomic Mass of element X. Give your answer to the nearest tenth (one decimal).
Element X has 2 isotopes. One of the isotopes has a mass of 18.9 with an abundance of 75.4%. The second isotope with a mass of 20.2 and an abundance of 24.6%. Calculate the average Atomic Mass of element X. Give your answer to the nearest tenth (one decimal).
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Transcribed Image Text:Element X has 2 isotopes. One of the isotopes has a mass of 18.9 with an abundance of 75.4%. The second isotope with a mass of
20.2 and an abundance of 24.6%. Calculate the average Atomic Mass of element X.
Give your answer to the nearest tenth (one decimal).
Expert Solution
Step 1
Given:
Mass of the first isotope m1 = 18.9 with 75.4% of abundance
Mass of the second isotope m2 = 20.2 with 24.6% of abundance
Atomic mass of an isotopic element is given by the sum of the product of the percentages of abundance of an isotope to the mass of the isotope.
If isotope of atomic mass mA found with abundance A% and another isotope mB found with abundance B% then the mass of the element would be:
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