The half life of a pollutant is 0.9 per year. If the decomposition of the pollutant in water is 15°C follows a first order kinetics and a local factory spills 6.5 ×10^-3 moles of this pollutant into a lake with a volume of 2500 cm^3, what will the concentration of the pollutant ve after 24 months, assuming the lake temperature remains constant at 15°C?
