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July 25, 2014

Homework Help: Chemistry

Posted by Jess on Friday, May 3, 2013 at 8:17pm.

Zinc has three major and two minor isotopes. For this problem, assume that the only isotopes of zinc are the major ones, zinc-64, zinc-66, and zinc-68. The atomic mass of zinc-64 is 63.9291 Da, that of zinc-66 is 65.9260 Da, and that of zinc-68 is 67.9248 Da. Calculate the atomic mass of zinc from the relative peak intensities in the following spectrum.

Peaks: At Zn-64=100, Zn-66=57.4, Zn-68=38.6

thanks!

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