Half life time for first order reaction is 25 minutes . What time will be required for 99% completion of reaction ?

Explanation

To solve the problem of determining the time required for 99% completion of a first-order reaction given a half-life of 25 minutes, we can follow these steps:

### Step 1: Understand the relationship between half-life and rate constant
For a first-order reaction, the half-life (t₁/₂) is related to the rate constant (k) by the formula:
\[ t_{1/2} = \frac{0.693}{k} \]

### Step 2: Calculate the rate constant (k)
Given that the half-life is 25 minutes, we can rearrange the formula to find k:
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