Question

Which of these mole ratios is possible for this reaction? 4P 5O2 → 2P2O5

4:5

2:1

1:2

5:2

Answer 1

2:1 most likely due to the fact that there is 4 P when compared to the whole equation which has a 2. However, it is hard for me to read it because it works easier with spaces for me :)

Answer 2

The answer is 4:5

Step-by-step explanation:

First we must verify that the equation is balanced, for that, we write the equation:

4P + 5O2 = 2P2O5

It is the formation equation of phosphorus oxide V, it is a synthesis reaction. It is observed in the equation that 4 moles of phosphorus react with 5 moles of oxygen to form 2 moles of phosphorus oxide V, therefore there is a molar ratio between phosphorus and oxygen of 4 to 5 (4:5).