Phosphorus and its compounds

Hybridisation of phosphorus in the compound xy is : PBr_(5)(s)+Br_(2)(g)rarrxy(s) [xy = Ionic compound]

0.12 gm of an organic compound containing phosphorus gave 0.22 gm of Mg_2P_2O_7 by the usual analysis. Calculate the percentage of phosphorus in the compound.

Phosphorus and its Allotropes || Phosphine and its Properties || Oxyacids of Phosphorus

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