Calculate the mass of phosphorus oxide (v), which is formed by the interaction of 15.5 g of phosphorus with oxygen

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

4P + 5O2 = 2P2O5;

4 phosphorus atoms interact with 5 oxygen molecules. During the reaction, 2 molecules of pentavalent phosphorus oxide are synthesized.

Let’s calculate the chemical amount of a substance contained in phosphorus weighing 15.5 grams.

M P = 31 grams / mol;

N P = 15.5 / 31 = 0.5 mol;

From this amount of phosphorus, it is possible to synthesize 0.25 mol of phosphorus oxide.

The weight of pentavalent phosphorus oxide will be:

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

m P2O5 = 0.25 x 142 = 35.5 grams;