How do you determine the average weighted isotopic mass of Carbon?

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How do you determine the average weighted isotopic mass of Carbon?

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Answer 1 · 2017-02-05T22:13:38

Well, first you must quote the percentage isotopic masses of the common isotopes.

Explanation:

According to this site, $^{12} C$ $""^12C$ has a 99% abundance, and $^{13} C$ $""^13C$ has a 1% abundance (there are other isotopes, but these are the most abundant). The weighted average is $(12 \times 0.99)$ $(12xx0.99)$ $+ (13 \times 0.01)$ $+(13xx0.01)$ $amu$ $"amu"$ $=$ $=$ $12.01$ $12.01$ $amu$ $"amu"$ .

The $^{13} C$ $""^13C$ isotope is a very important nucleus inasmuch as $^{13} C {^{1} H}$ $""^13C{""^1H}$ $NMR spectroscopy$ $"NMR spectroscopy"$ can be routinely performed.

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How do you determine the average weighted isotopic mass of Carbon?

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