What amount of phosphorus (V) oxide is formed by the interaction of phosphorus with oxygen

What amount of phosphorus (V) oxide is formed by the interaction of phosphorus with oxygen, with a volume of 5.6 liters.

1. Let’s write down the reaction equation:

4P + 5O2 = 2P2O5.

2. Find the amount of oxygen (Vm – molar volume, constant equal to 22.4 l / mol):

n (O2) = V (O2) / Vm = 5.6 L / 22.4 L / mol = 0.25 mol.

3. According to the reaction equation, we find the amount of phosphorus oxide formed:

2n (P2O5) = 5n (O2).

n (P2O5) = 2.5n (O2) = 2.5 * 0.25 mol = 0.625 mol.

Answer: n (P2O5) = 0.625 mol.