Determine the mass of oxygen spent on the reaction with 62 g of phosphorus.

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 62 grams.

M P = 31 grams / mol;

N P = 62/31 = 2 mol;

2 moles of phosphorus will react with 2 x 5/4 = 2.5 moles of oxygen.

The oxygen weight will be:

M O2 = 16 x 2 = 32 grams / mol;

m O2 = 2.5 x 32 = 80 grams;