How many grams of phosphorus oxide will be obtained by burning 3.1 grams of phosphorus (P2)

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

2P + 2.5 O2 = P2O5;

From two moles of phosphorus, one mole of its oxide is formed.

Let’s determine the amount of substance in 3.1 grams of phosphorus.

M P = 31 grams / mol;

N P = 3.1 / 31 = 0.1 mol;

Let us determine the mass of 0.1 mol of phosphorus oxide.

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

m P2O5 = 0.1 x 142 = 14.2 grams;