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Answer : The time passed in years is
Explanation :
Half-life = 5730 years
First we have to calculate the rate constant, we use the formula :
Now we have to calculate the time passed.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = time passed by the sample = ?
a = let initial amount of the reactant = X g
a - x = amount left after decay process =
Now put all the given values in above equation, we get
Therefore, the time passed in years is