For a first order reaction, show that the time required for `99%` completion is twice the time required for the completion of `90%` of reaction.

Explanation

To show that the time required for 99% completion of a first-order reaction is twice the time required for the completion of 90% of the reaction, we can use the first-order reaction kinetics formula.

### Step-by-Step Solution:

1. **Understand the Formula**:
For a first-order reaction, the time required for a certain percentage of completion can be expressed using the formula:
\[
T = \frac{2.303}{k} \log \left( \frac{A}{A - X} \right)
...