Question

chemical equations need to be balanced in order to satisfy the law of

Answer 1

To satisfy the law of conservation of mass

Answer 2

Answer: Every chemical equation follows law of conservation of mass.

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

$2H_2+O_2\rightarrow 2H_2O$

Total mass on the reactant side = $[2(2\times 1)+(2\times 16)]=36g/mol$

Total mass on the product side = $[2((2\times 1)+16)]=36g/mol$

Hence, every chemical equation follows law of conservation of mass.