What do you understand by the rate law and rate constant of a reaction? Identify the order of a reaction if the units of its rate constant are :

Explanation

### Step-by-Step Solution:

1. **Understanding Rate Law**:
The rate law of a chemical reaction is an equation that relates the rate of the reaction to the concentration of the reactants. It is generally expressed in the form:
\[ \text{Rate} = k[A]^m[B]^n \]
where:
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