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The half-life of 131I is

Iodine-131 has a half life of 2.2 × 10-2 year. How long will it take to reduce a 130 g sample of 131I to 74 g 131I?
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2. asked by Kymora
3. 1,722 views
Iodine 131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of 131I remains.What is the half life of 131I?
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2. asked by Natalie
3. 4,827 views
The half-life of 131I is 8.021 days. What fraction of a sample of 131I remains after 24.063 days?1/2 1/4 1/8 1/16 Please help.
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2. asked by Kiki
3. 2,426 views
A thyroid cancer patient is given a dosage of 131I(half-life = 8.1 d). What fraction of the dosage of 131I will still be in the
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2. asked by Truth
3. 115 views
A thyroid cancer patient is given a dosage of ^131I (half-life = 8.1 d). What fraction of the dosage of 131I will still be in
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2. asked by Truth
3. 95 views
We have not even covered this material.Samples of 131I take 10 hours to prepare to ship. It takes 2 weeks to get to its
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2. asked by What?
3. 434 views
There are 5g of 131I left after 40.35 days. How many grams were in the original sample if its half-life is 8.07 days?What is the
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2. asked by malia
3. 2,331 views
What happens to the half-life of Uranium-238 if the number of U particles in the bucket is increased? What does this teach you
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2. asked by pakyo
3. 114 views
What happens to the half life of carbon-14 if the number of C particles in the bucket is increased? What does this teach you
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2. asked by pakyo
3. 95 views
What happens to the half-life of Uranium-238 if the number of U particles in the bucket is increased? What does this teach you
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2. asked by freedom
3. 110 views