There is much volcanic activity in Iceland, and the country straddles the Mid-Atlantic Ridge. Therefore, Iceland is situated ___
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Decay of Ar-40 produces 1.33 mmol of K-40. Remaining number of moles of Ar-40 is 1.50 mmol. Initial mmol of Ar-40 present will be sum of number of moles of K-40 and remaining number of moles of Ar-40.
now, half life time of the reaction is
For first order reaction, rate constant and half-life time are related to each other as follows:
Putting the value of ,
Rate equation for first order reaction is as follows:
Here, is initial concentration and
is concentration at time t.
Therefore, time required to cool the rock is .