the half-life of a pesticide determines its persistence in the environment. a common pesticide degrades in a first-order process with a half-life of 4 days. 0.176 fraction (in decimal notation) of the pesticide remains in the environment after 10 days, enter to 4 decimal places.\
No of half lifes (n) = total time / half life
n= 10/4 = 2.5
Amount of pesticide remains = Ao(1/2)n
Ao is the initial amount
Amount left = Ao(1/2)2.5= Ao(00176)= 0.176 Ao
If we assume Ao=1
Then Amount left = 0.176
A chemical substance's ability to exert negative effects and travel to distant areas can be enhanced by its environmental persistence, which is a crucial feature. The pace of biological and chemical processes, such as photolysis, atmospheric oxidation, hydrolysis, and biodegradation, that remove organic substances from the environment determines how long they remain in the environment.
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