kaylailkanic1487
20.04.2020 •
Chemistry
Typical audience for a vaudeville show
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Ответ:
intended for all-male audience
Explanation:
Ответ:
half life = , are taken for the concentration to decrease to 25% and for the concentration to decrease to 6.25% .
Explanation: The given information says, the reaction is first order with respect to . For first order reaction, rate constant and half life are related to each other as:
half life =
(where k stands for rate constant)
Value of k is given as
half life =
half life = 1117.74 min or
Let's say the initial concentration is 100. It asks to calculate the time taken to decrease the concentration to 25% which will be 25 as we have taken the initial concentration 100.
The equation that we use is:
Where, is initial and A is remaining concentration or amounts. k is rate constant and t is the time. Let's plug in the values and do calculations for t.
t = 2241.94 min or
We can calculate the time when the concentration decreases to 6.25% of its initial value same as we did for the above.
t = 4483.87 min or
So, the answers for all the three parts are: half life = , are taken for the concentration to decrease to 25% and for the concentration to decrease to 6.25% .