For a first order reaction, the unit of rate is _______ and that of rate constant is _______ .

Explanation

To solve the question regarding the units of rate and rate constant for a first-order reaction, we can break it down into clear steps.

### Step-by-Step Solution:

1. **Understanding Rate**:
- The rate of a reaction is defined as the change in concentration of a reactant or product over time. It can be expressed mathematically as:
\[
\text{Rate} = -\frac{d[R]}{dt} \quad \text{(for reactants)}
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