Calculate the mass and amount of phosphorus oxide +5, which is formed by the interaction of 15.5

Calculate the mass and amount of phosphorus oxide +5, which is formed by the interaction of 15.5 grams of phosphorus with oxygen.

The oxidation reaction of phosphorus to oxygen is described by the following chemical reaction equation.

4P + 5O2 = 2P2O5;

The phosphorus oxide molecule has two phosphorus atoms. Therefore, to obtain one mole of phosphorus oxide, two moles of phosphorus are required.

Let’s find the amount of the substance contained in 15.5 grams of phosphorus.

M P = 31 grams / mol;

N P = 15.5 / 31 = 0.5 mol;

Let’s find the mass and amount of the phosphorus oxide substance.

N P2O5 = N P / 2 = 0.5 / 2 = 0.25;

Its molar mass is.

M P2O5 = 31 x 2 + 16 x 5 = 142 grams / mol;

The mass of the substance will be.

m P2O5 = 142 x 0.25 = 35.5 grams;