Balancing Equation
When a comical reaction takes place:Atoms cannot be lost or gained. They are simply rearranged.
The subscript indicates the “NUMBER OF ATOMS” of the specific element present in the formula. When the number is in front (2H) it indicates the ratio to which elements, compounds or molecules reacts with one another.
H2 + O2 —> H2O , hydrogen and oxygen are both diatomic elements.
Start with the OXYGEN
Left hand side : 2 atoms Right hand side: 1 atom
We cannot add a 2 after the O on the right hand side cause that will change the entire formula into a different compound .
(2H²O)If you put 2 in front of the formula for water, you will cahmge the number of atoms present in the compound. Because there is only 1 atom in formula it will be 2×1 resulting in 2 Oxygen atoms in the compound.
The big 2 infrastructure indicates that there are 2 molecules of water in the formula. Now it’s balanced, but it doesn’t only change the oxygen atoms it also changes the hydrogen
2×2 results in 4 hydrogen atoms on the right hand side, with only 2 hydrogen atoms on the left hand side to counteract this change I just now add a big 2 on the left hand side.

BALANCED EQUATION
