How many grams of magnesium oxide is formed by burning 2.4 g of magnesium?

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 2.4 grams of magnesium.

M Mg = 24 grams / mol;

N Mg = 2.4 / 24 = 0.1 mol;

Let us determine the mass of 0.1 mol of magnesium oxide.

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

m Mg O = 0.1 x 40 = 4.0 grams;