Calculate the amount of oxalic acid `(H_(2)C_(2)O_(4).2H_(2)O)` required to obtain `250m` of deci-molar solution.

Explanation

To calculate the amount of oxalic acid (H₂C₂O₄·2H₂O) required to prepare a 250 mL deci-molar solution, we can follow these steps:

### Step 1: Understand the Definition of Deci-molar Solution
A deci-molar (0.1 M) solution means that there are 0.1 moles of solute (oxalic acid in this case) per liter of solution.

### Step 2: Convert Volume from mL to L
Since molarity is expressed in moles per liter, we need to convert the volume from milliliters to liters:
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