Naturally occurring iodine has an atomic mass of 1269045 a, Ask an Expert

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

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

atomic mass= x amu

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