Question

Magnesium and oxygen combine in the ratio of 3:2 by mass to form magnesium oxide what mass of oxygen gas would be required to react completely with 24gm of magnesium

Answer 1

Answer: Magnesium (Mg) and Oxygen (O) combine in the ratio = 3:2 to form compound magnesium oxide (MgO). It follows Law of Constant proportions. ⇒ 3g of Mg combines with = 2g of O. ∴ 12g of Mg combines with = 2 × 12/3 = 8g of O.