A 110.520 g sample of mineral water is anlyzed for its magnesium content.The Mg2+ in the sample is frist precipitated as MgNH4PO4, and this precipitated is then converted to MgP2O7, with is found toweigh 0.0549 g. Express the quantity of magnesium in the sample in past per million (that is, in grams of Mg per million grams of H2O).