Consider an element, A, that has two isotopes, x and y. If the natural abundance

Question

Consider an element, A, that has two isotopes, x and y. If the natural abundances of each isotope are a and b (a + b-1), respectively, and there are two atoms of the element in a molecule, the probability of finding each combination of isotopes can be determined by the following equations probability of two A atoms a probability of one xA atom and one yA atom=2ab probabilitv of two atoms=b Using the equations above and the information provided in the table, calculate the probability of finding each isotope combination of Br in CBr2F2 Element Mass Mass (Da) Abundance Number (atom %) Probability of finding two 7Br atoms 1.007825 99.988 2.01410 0.012 10.01294 19.9 11.00931 80.1 15.999491 99.757 16.99913 0.038 17.99916 0.205 18.99840 100 34.96885 75.78 36.96590 24.22 78.91834 50.69 Number 2 10 16 Probability of finding one 7Br atom and one 8 Br atom. 18 19 35 37 79 Number Scroll down for another question Cl

Explanation / Answer

two 79Br = 25.69%

one 79 Br one 81 br= 25.15%

two 81Br = 24.31%

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