How many grams of phosphorus oxide 5 is formed when 6 grams of phosphorus is burned?

The synthesis reaction of phosphorus oxide is described by the following chemical reaction equation:

4P + 5O2 = 2P2O5;

4 phosphorus atoms interact with 5 oxygen molecules. This synthesizes 2 molecules of phosphorus oxide.

Let’s calculate the chemical amount of a substance in phosphorus weighing 6 grams.

M P = 31 grams / mol;

N P = 6/31 = 0.194 mol;

From this amount of phosphorus, it is possible to synthesize 0.194 / 2 = 0.097 mol of its oxide.

Let’s calculate its weight.

To do this, multiply the amount of the substance by its molar weight.

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

m P2O5 = 142 x 0.097 = 13.774 grams;