Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
`P + 5HNO_3"(conc.) "rarr H_3PO_4 + H_2O + 5NO_2`
If 9.3 g of phosphorus was used in the reaction, calculate :
Number of moles of phosphorus taken.

Explanation

To calculate the number of moles of phosphorus (P) used in the reaction, we can follow these steps:

### Step 1: Understand the Formula for Moles
The number of moles of a substance can be calculated using the formula:
\[ \text{Number of moles} = \frac{\text{Given weight (g)}}{\text{Molar weight (g/mol)}} \]

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