Answer:
The word equation is:
![\text { hydrogen peroxide } \rightarrow \text { oxygen gas + water }](https://img.qammunity.org/2020/formulas/chemistry/middle-school/izklb2dgh2fb1xrmkvs8whhg6n6939g9qr.png)
This reaction happens when there is the decomposition of hydrogen peroxide into oxygen and water. Thus, the equation would be
![H_(2) O_(2) \rightarrow O_(2)+H_(2) O](https://img.qammunity.org/2020/formulas/chemistry/middle-school/1eqj7so6r9c2iy0jxo1yiwy4so6puu6ld4.png)
Balancing the equation requires to have the same number of atoms of each element on both the side. To balance this equation we need to add 2 water (
) molecules and 2 hydrogen peroxide (
) molecules . As we know, oxygen is naturally diatomic. Thus, the balancing equation would be:
![2 H_(2) O_(2) \rightarrow O_(2)+2 H_(2) O](https://img.qammunity.org/2020/formulas/chemistry/middle-school/pzmlwonivo8c10qbdghusddb6rnc8x8tty.png)