Give one example of a reaction where order and molecularity are equal.

Explanation

To answer the question of providing an example of a reaction where the order and molecularity are equal, we can follow these steps:

### Step-by-Step Solution:

1. **Define Molecularity and Order**:
- **Molecularity** refers to the number of reactant molecules involved in an elementary reaction. It can be classified as unimolecular, bimolecular, or termolecular based on the number of molecules.
- **Order** of a reaction is the sum of the powers of the concentration terms in the rate law expression. It indicates how the rate of reaction depends on the concentration of the reactants.

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