Question

a unimolecular chemical reaction where the reaction rate is directly proportional to the reactants concentration is a ——— order reaction. zero first second third

Explanation:

In chemical kinetics, for a first - order reaction, the rate law is $r = k[A]$, where $r$ is the reaction rate, $k$ is the rate constant, and $[A]$ is the concentration of the reactant. This shows that the reaction rate is directly proportional to the reactant's concentration. For zero - order reactions, the rate is independent of the reactant's concentration ($r = k$), for second - order reactions the rate is proportional to the square of the reactant's concentration ($r=k[A]^2$), and for third - order reactions, the rate is proportional to the cube of the reactant's concentration ($r = k[A]^3$).

Answer:

First