Find number of `Na^(+)` & `PO_(4)^(-3)` ions in `250mol` of `0.2M Na_(3)PO_(4)` solution .

Explanation

To find the number of `Na^(+)` and `PO_(4)^(-3)` ions in a `250 mL` of `0.2 M Na_(3)PO_(4)` solution, we can follow these steps:

### Step 1: Determine the number of moles of `Na_(3)PO_(4)`
Using the formula for molarity:
\[ \text{Molarity} = \frac{n}{V} \]
where \( n \) is the number of moles and \( V \) is the volume in liters.
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