Answer: Every chemical equation follows law of conservation of mass.
Step-by-step explanation:
Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.
This also means that total mass on the reactant side must be equal to the total mass on the product side.
Every balanced chemical equation follows law of conservation of mass.
For Example: Formation of water

Total mass on the reactant side =
![[2(2* 1)+(2* 16)]=36g/mol](https://img.qammunity.org/2017/formulas/chemistry/high-school/y6sucdikpe3n1zj8f36ji7vwghrlf86epy.png)
Total mass on the product side =
![[2((2* 1)+16)]=36g/mol](https://img.qammunity.org/2017/formulas/chemistry/high-school/ohzkf9v5h2vqee6gieppsc2j9nev6uvrw2.png)
Hence, every chemical equation follows law of conservation of mass.