Calculate the volume of `8%` by mass solution of `NaOH (d = 1.34 g//cm^(3))` to prepare 500 ml of `4%` by mass solution of `NaOH (d = 1.24 g//cm^(3))`.

Explanation

To solve the problem of calculating the volume of an 8% by mass solution of NaOH needed to prepare 500 ml of a 4% by mass solution of NaOH, we will follow these steps:

### Step 1: Understand the given data
- We have an 8% NaOH solution with a density of 1.34 g/cm³.
- We need to prepare 500 ml of a 4% NaOH solution with a density of 1.24 g/cm³.

### Step 2: Calculate the molarity of the 8% NaOH solution
The formula for molarity (M) is given by:
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