How many grams of magnesium oxide is formed when burning magnesium weighing 6 g?

The combustion reaction of magnesium is described by the following chemical reaction equation:

Mg + 0.5 O2 = MgO;

From one mole of magnesium, one mole of magnesium oxide is formed.

Let’s determine the amount of substance in 6 grams of magnesium.

M Mg = 24 grams / mol;

N Mg = 6/24 = 0.25 mol;

Let us determine the mass of 0.25 mol of magnesium oxide.

M Mg O = 24 + 16 = 40 grams / mol;

m Mg O = 0.25 x 40 = 10 grams;