What molarity of 30ml `Na_(2)S_(2)O_(3)` will be needed to completely neutralise 12.7 g of iodine?

Explanation

To find the molarity of Na₂S₂O₃ needed to completely neutralize 12.7 g of iodine (I₂), we can follow these steps:

### Step 1: Calculate the number of moles of iodine (I₂).
First, we need to find the molar mass of iodine (I₂). The atomic mass of iodine is approximately 127 g/mol.

\[ \text{Molar mass of I}_2 = 2 \times 127 \, \text{g/mol} = 254 \, \text{g/mol} \]
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