The reaction A - B is first order in [A]. Consider the following data.
-The half- life of this reaction is s.

Question

The reaction A - B is first order in [A]. Consider the following data. 
-The half- life of this reaction is s.

Quizplus · Accepted Answer

The half-life of a first-order reaction is given by:
t1/2 = ln(2) / k
where k is the first-order rate constant.

From the data given in the table, we can calculate the rate constant as follows:
k = ln(2) / t1/2 = ln(2) / 4.9 s⁻¹ = 0.141 s⁻¹

Therefore, the best choice for the half-life of the reaction is option B (4.9 s).

The Reaction a - B Is First Order in [A]