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Question:
Tritium has a half-life of 12.3 years. When the activity of a tritium sample has decreased to 6.25% of its original value, how many years have passed
Answer:
Answer:
t = 49.20 years
Explanation:
Half life expression for first order kinetic is:
Half life = 12.3 years
Where, k is rate constant
So,
The rate constant, k = 0.05635 years⁻¹
Using integrated rate law for first order kinetics as:
Where,
is the concentration at time t
is the initial concentration
Given:
is 6.25 % of . So,
= 0.0625
t = ?
t = 49.20 years
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