What mass of the substance is formed when 36 grams of magnesium are burned?

Magnesium combustion reaction: 2Mg + O2 = 2MgO.
1) Molar mass of magnesium according to the periodic table: 24.
2) Find the amount of magnesium substance. To do this, divide the mass of magnesium by its molar mass: 36/24 = 1.5 mol.
3) According to the reaction equation, the amounts of magnesium and magnesium oxide substances are 2: 2. This means that the amount of magnesium oxide substance is 1.5 mol.
4) Molar mass of magnesium oxide: 24 + 16 = 40.
5) Find the mass of magnesium oxide. To do this, we multiply the molar mass of magnesium oxide by the amount of substance: 40 * 1.5 = 60g – the answer.