Calculate the molarity `(M)`of a solution of oxalic acid `[(COOH)_(2) . 2H_(2) O]` containing `12.6 g` of the acid in `100 mL` of the solution.

Explanation

To calculate the molarity (M) of a solution of oxalic acid \((COOH)_2 \cdot 2H_2O\) containing 12.6 g of the acid in 100 mL of the solution, follow these steps:

### Step 1: Calculate the Molar Mass of Oxalic Acid
The molecular formula of oxalic acid is \((COOH)_2 \cdot 2H_2O\).

- **Carbon (C)**: There are 2 carbon atoms, and the atomic mass of carbon is approximately 12 g/mol.
\[
2 \times 12 = 24 \text{ g/mol}
...