Write the formula of the compound of phosphorus which is obtained when conc. `HNO_(3)` oxidises `P_(4)`.

Explanation

To find the formula of the compound of phosphorus obtained when concentrated HNO3 oxidizes P4, we can follow these steps:

### Step 1: Understand the Reactants
We start with phosphorus in the form of P4 and concentrated nitric acid (HNO3).

### Step 2: Determine the Oxidation State of Nitrogen
In HNO3, the oxidation state of nitrogen can be calculated as follows:
- Let the oxidation state of nitrogen be \( x \).
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