A first order reaction has a rate constant of `1.15xx10^(-3) s^(-1)`. How long will 5 g of this reactant take to reduce to 3 g ?

Explanation

To solve the problem of how long it will take for a first-order reaction to reduce 5 g of reactant to 3 g, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the First-Order Reaction Formula**:
For a first-order reaction, the time taken (t) can be calculated using the formula:
\[
t = \frac{2.303}{k} \log \left( \frac{A_0}{A_t} \right)
...