Question

The decomposition of water into hydrogen gas H2 and oxygen gas O2 can be modeled by the balanced chemical equation

A) H2 + O2 → H2O
B) H2O → H2 + O2
C) 2H2 + O2 → 2H2O
D) 2H2O → 2H2 + O2

Answer 1

2H2O➡2H2+O2 is the correct balanced equation of decomposition

Because decomposition means a molecule breaking down in to segments

Answer 2

Answer:
`2H_2O\rightarrow 2H_2+O_2`

Explanation:

Decomposition is reaction where a single reactant produces two or more than two products.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for the decomposition of water is :

`2H_2O\rightarrow 2H_2+O_2`