Magnesium burns with oxygen to give magnesium oxide based on the following reaction: 2M<span>g</span>+<span>O<span>2 </span></span>........> 2Mg<span>O<span>(s)</span></span>+<span>energy </span>From the periodic table: molecular mass of magnesium = 24.3 grams molecular mass of oxygen = 16 grams
From the reaction: 2 x 24.3 = 48.6 grams of magnesium are required to produce 2(24.3+16) = 80.6 grams of magnesium oxide. We can know the amount of magnesium oxide produced from 8 grams of magnesium by simply doing cross multiplication as follows: amount of magnesium oxide = (8 x 80.6) / 48.6 = 13.267 grams
