What is the percentage of p2o5 in mg2p2o7?

We need a basis of 100 g mg2p2o7. We need to determine the amount of p2o5 from the amount given. We do as follows:

mass p2O5 = 100 g mg2p2o7 ( 1 mol / 364.4978 g ) ( 1 mol P2O5 / 1 mol Mg2P2O7 ) ( 283.89 g / mol ) = 77.89 g P2O5

Percent = 77.89 / 100 x 100 = 77.89%

Hope this helps. Have a nice day.

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