A first order reaction has a specific rate constant of `2xx10^(-3)s^(-1)` . How much time it will take for20 gm to reduce to 5 g ?

Explanation

To solve the problem of how much time it will take for a first-order reaction to reduce 20 g of a substance to 5 g, we can use the first-order kinetics formula. Here's a step-by-step solution:

### Step 1: Identify the given values
- Initial mass (A₀) = 20 g
- Final mass (A) = 5 g
- Rate constant (k) = 2 × 10^(-3) s^(-1)

### Step 2: Use the first-order reaction formula
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