Asked by Ashley

The disintegration of a radioisotope, such as I-131 to Xe-131, is another example of a first-order reaction.
It has a half-life of 8.0 days.

I-131 -> Xe-131 + e

If you start with 1.40 g I-131, how many grams of I-131 will be left after the following days?

PLEASE HELP!!!!
Answered by DrBob222
See your post above.
Answered by Anonymous
A vial contains radioactive iodine-131 with an activity of 3.7 mCi per milliliter. If the thyroid test requires 2.9 mCi in an "atomic cocktail," how many milliliters are used to prepare the iodine-131 solution?
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