Question

3. In a first­ order reaction, what is the rate constant if the rate is 0.060M/s and the reactant concentration is 0.030M?

Answer 1

The rate law for a first order reaction is:
rate = k x [A]
where k is the rate constant and [A] is the concentration of the reactant A. The rate of a first order reaction depends only on concentration of one reactant.

Here, rate = 0.060 M/s and [A] = 0.030 M.
From the first equation, we can write:
k = rate / [A]
k = 0.060 M/s / 0.030 M = 2 s^-1