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

**Step 1: Define 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:
\[ \text{Rate} = k [A]^{\alpha} [B]^{\beta} \]
where:
- \( k \) is the rate constant,
- \( [A] \) and \( [B] \) are the molar concentrations of reactants A and B,
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