In an experiment, students were given an unknown mineral. The unknown mineral was placed in 150 ml of water. Once in the water,
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Radio active decay reactions follow first order rate kinetics.
a) The half life and decay constant for radio active decay reactions are related by the equation:
Where k is the decay constant
b) Finding out the decay constant for the decay of C-14 isotope:
c) Finding the age of the sample :
35 % of the radiocarbon is present currently.
The first order rate equation is,
t = 7923 years
Therefore, age of the sample is 7923 years.