Cobalt 60 has a half-life of about 5 years. How many grams of 300 g sample will remain after 20 years? 1. 0.0625 g 2. 9.375 g 3. 18.75 g 4. 37.5 g

asked Dec 20, 2019 186k views

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Cobalt 60 has a half-life of about 5 years.

How many grams of 300 g sample will remain after 20 years?

1. 0.0625 g
2. 9.375 g
3. 18.75 g
4. 37.5 g

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2 votes

Answer:

3. 18.75

Explanation:

took the test and got it correct

Tleb answered Dec 21, 2019

by Tleb

5.8k points

5 votes

after 5 years ...150g
after 10 years..75 g
after 15 years...37,5
after 20 years...18,75 g

Dettorer answered Dec 27, 2019

6.5k points

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