Calculate the mass of calcium that can be burned in 33.6 liters of oxygen. How to write an equation for this problem?

Calcium reacts with oxygen to oxidize. This reaction is described by the following equation:

Ca + ½ O2 = CaO;

When the reaction proceeds, one oxygen atom is attached to the calcium atom. In this case, one molecule of calcium oxide is synthesized.

Let’s determine the chemical (molar) amount of oxygen.

Divide the available volume of oxygen by the volume of 1 mole of gas (22.4 liters).

N O2 = 33.6 / 22.4 = 1.5 mol;

In this reaction, 2 times more calcium will react with oxygen.

Let’s calculate its weight.

N Ca = 1.5 x 2 = 3 mol; M Ca = 40 grams / mol; m Ca = 3 x 40 = 120 grams;