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<u>Answer:</u> The concentration of radon after the given time is
<u>Explanation:</u>
All the radioactive reactions follows first order kinetics.
The equation used to calculate half life for first order kinetics:
We are given:
Putting values in above equation, we get:
Rate law expression for first order kinetics is given by the equation:
where,
k = rate constant =
t = time taken for decay process = 3.00 days
= initial amount of the reactant =
[A] = amount left after decay process = ?
Putting values in above equation, we get:
Hence, the concentration of radon after the given time is