Based on the half-life of the reaction, time taken for the partial pressure of ammonia to decrease from 0.100 atm to 0.00625 atm is 800 seconds.
<h3>What is the half-life of a substance?</h3>
The half-life of a substance is the time taken for half the amount of atoms present in that substance to decay.
The half-life of the reaction is 200 seconds.
After, one half-life, pressure reduces to 0.0500 atm
After, two half-lives, pressure reduces to 0.0250 atm
After, three half-lives, pressure reduces to 0.01250 atm
After, four half-lives, pressure reduces to 0.00625 atm
Time taken = 4 * 200 = 800 seconds
Therefore, time taken for the partial pressure of ammonia to decrease from 0.100 atm to 0.00625 atm is 800 seconds.
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