1.5 g of an organic compound in a quantitative determination of phosphorus gave 2.5090 g of `Mg_2 P_2 O_7`. Calculate the percentage of phosphorus in the compound.

Explanation

To calculate the percentage of phosphorus in the organic compound, follow these steps:

### Step 1: Calculate the molecular weight of Mg₂P₂O₇
The molecular weight of Mg₂P₂O₇ can be calculated using the atomic weights of magnesium (Mg), phosphorus (P), and oxygen (O).

- Atomic weight of Mg = 24 g/mol
- Atomic weight of P = 31 g/mol
- Atomic weight of O = 16 g/mol
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