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Answer:
It will take 3.3 s for [NOCl] to decrease to 0.042 M.
Explanation:
Integrated rate law for this second order reaction-
where, [NOCl] is concentration of NOCl after "t" time, is initial concentration of NOCl and k is rate constant.
Here, = 0.076 M, k = 3.2
and [NOCl] = 0.042 M
So,
or, t = 3.3 s
So, it will take 3.3 s for [NOCl] to decrease to 0.042 M.