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09-05-2021
Mathematics

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300 g of an unknown radioactive substance decays to 112 g after 180 seconds. What is the half-life of this substance?

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09-05-2021

Answer: 2.1 minutes

Explanation:
The half-life equation states that,
A=A0⋅(1/2)t/t0.5
A0 is the initial amount of substance
t is the time
t0.5 is the half-life of the substance

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