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malfutka [58]
3 years ago
6

Iodine-125 has a half-life of about 60 days. How many milligrams of a 500 mg sample will remain after 300 days?

Mathematics
2 answers:
AfilCa [17]3 years ago
7 0

Answer:

As stated correctly in the answer above it is in fact <u>15.625</u>

just olya [345]3 years ago
4 0

60 x 5 = 300 days

So five half-lifes = 300 days

Starting amount = 500mg

<span>Amount after 1st half-life = 250 mg</span>

<span>Amount after 2nd half-life = 125 mg</span>

<span>Amount after 3rd half-life = 62.5 mg</span>

<span>Amount after 4th half-life = 31.25 mg</span>

<span>Amount after 5th half-life = 15.625 mg</span>

<span>Hence after 300 days, the amount of iodine-125 will be 15.625 mg out of 500 mg.</span>

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