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