Question

Find the total percentage of Magnesium in magnesium nitrate crystals, Mg(NO₃)₂.6H₂O.

[Mg = 24, N = 14, O = 16 and H = 1]

Answer 1

Molar mass of Mg(NO₃)₂.6H₂O = 24 + (14 × 2) + (16 × 12 + (1 × 12))

= 256 g

Mass percent of magnesium = `24/256 xx 100`

= 9.37%