Question

Which of the following equations is balanced?

Answer 1

Answer:

the last equation

Explanation:

Answer 2

Answer:

4P + 5$O_{2}$ → 2$P_{2} O_{5}$

Explanation:

There are 4 molecules of phosphorus and 10 molecules of oxygen in the chemical reaction.

The resultant compound is 2$P_{2} O_{5}$, which is,

multiplying 2 with the subscript on P and O gives;

2 × 2 = 4 molecules of P and  

2 × 5 = 10 molecules of O

The chemical equation is balanced.