Question

Which of the following equations is balanced?

A. 4P + 5O2 ---> 2P2O5
B. P + 2O2 ---> PO2
C. 2P + O2 ---> P2O5
D. 4P + 2O2 ---> 2P4O5

Answer 1

A. there is four phosphorus and 10 oxygen on each side

Answer 2

Answer: Option (A) is the correct answer.

Step-by-step explanation:

A balanced equation is defined as the equation which contains same number of atoms on both reactant and product side.

For example,
`4P + 5O_2 rightarrow 2P_2O_5`

Here, no. of atoms on reactant side are as follows.

• P = 4

• O = 10

No. of atoms on product side are as follows.

• P = 4

• O = 10

As the number of atoms on both reactant and product side are same in this reaction equation. Hence, it is a balanced reaction equation.

Thus, we can conclude that
`4P + 5O_2 rightarrow 2P_2O_5` equations is balanced.