Units of rate constnat is the same for the elementary reactions :
Reaction (1) ` A + B + C to` products,
Reaction (2) , `A + 2B to` products,
Reaction (3), `3A to ` products. Substantiate.

Explanation

To determine the units of the rate constant for the given elementary reactions, we can follow these steps:

### Step 1: Write the rate law for each reaction.
For elementary reactions, the rate law can be directly derived from the stoichiometry of the reaction.

1. **Reaction (1)**: \( A + B + C \rightarrow \text{products} \)
- Rate law: \( \text{Rate} = k[A]^1[B]^1[C]^1 \)
- Therefore, \( \text{Rate} = k[A][B][C] \)
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