Question

what is law consvation of mass ? Is this law followed in all chemical reactions ? give examples ​

Answer 1

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity can neither be added nor be removed.

Answer 2

law of conservation of mass states that mass can neighter be created nor be destroyed

the need for balancing a chemical equation is to proove law of conservation of mass

only the balanced chemical equations are followed.

ex:-3Fe(s)+4H2O(g)