Question

An unbalanced chemical equation is shown:

H202 – 2H20 + O2
Which of the following statements explains why the equation is not balanced?

Answer 1

1. Two to decompose

Step-by-step explanation:

It's going to be a decomposition so you can eliminate answers 3 and 4. It is a decomposition because it is splitting apart. Then you can figure out that it is going to be two instead of four by balancing the equation

H2O2 → 2H2O + O2

`2H_(2)O_(2)  → 2H_(2)O + O_(2)`

Answer 2

Answer : The correct option is, (1) Two
`H_2O_2` molecule should decomposes to form the given products.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

The given unbalanced chemical reaction is,

`H_2O_2\rightarrow 2H_2O+O_2`

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen and oxygen atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' put before the
`H_2O_2` and we get the balanced chemical equation.

The balanced chemical reaction will be,

`2H_2O_2\rightarrow 2H_2O+O_2`

Hence, the correct option is, (1) Two
`H_2O_2` molecule should decomposes to form the given products.