November 29, 2015

Homework Help: chemistry

Posted by Mely on Wednesday, September 8, 2010 at 9:49am.

Naturally occurring iodine has an atomic mass of 126.9045. A 12.3849 -g sample of iodine is accidentally contaminated with 1.00070 g of ^129 I, a synthetic radioisotope of iodine used in the treatment of certain diseases of the thyroid gland. The mass of ^129 I is 128.9050amu.

Find the apparent "atomic mass" of the contaminated iodine.

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