5.47 g of magnesium metal reacted completely with 14.31 g of a non-metal. The compound of this non-metal with hydrogen contains 3.1% hydrogen. Calculate the equivalent weight of magnesium.

Wt. of Mg = 5.47gWt. of non-metal  that combined with Mg= 14.31gWt. of non-metal in hydrogen compound of non-metal = 100-3.1=96.9g96.9 g non-metal contain 3.1g of H2∴14.31g non-metal contain H2=3.196.9×14.31=0.46g.We know,  Eq. wt. of metal = wt. of metal  wt. of H2×1.008=5.470.46g×1.008=11.98 Ans.