How many grams of magnesium can be burned in 224 liters of oxygen to make magnesium oxide?

The volume of oxygen is 224 liters.

Let’s determine the mass of magnesium.

Let’s compose the equation for the reaction of interaction of magnesium with oxygen.

2Mg + O2 = 2MgO.

Let’s determine the amount of oxygen.

n = V / Vm.

n = 224 / 22.4 = 10 mol.

Let’s determine the amount of magnesium substance according to the reaction equation.

X mol of magnesium is 10 mol of oxygen.

2 mol of magnesium – 1 mol of oxygen.

X = 2 * 10/1 = 20 mol.

n = m / M.

Let’s determine the molar mass of magnesium.

M (Mg) = 24 g / mol.

m = 24 g / mol * 20 mol = 480 g.

Answer: the mass of magnesium is 480 g.