1.6 g of an organic compound gave 2.6 g of magnesium pyrophosphate. The percentage of phosphorus in the compound is

Question

1.6 g of an organic compound gave 2.6 g of magnesium pyrophosphate. The percentage of phosphorus in the compound is, 45.38%, 54.38%, 37.76%, 19.02%

MARKS App · Accepted Answer

Mass of Phosphorus = 31 u Since 1 mole of Mg 2 P 2 O 7 has 2 g atoms of P Mass of Phosphorus in Mg 2 P 2 O 7 = 62 u Mass of Mg 2 P 2 O 7 = 222.5 u Weight of Mg 2 P 2 O 7 = 2.6 g Weight of organic compound = 1.6 g Percentage of phsphorus = Mass of phsphorus Mass of Mg 2 P 2 O 7 × Weight of Mg 2 P 2 O 7 Weight of organic compound × 100 Percentage of phsphorus = 62 222.5 × 2.6 1.6 × 100 = 45.38 %

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