How to balance this equastion :

_H2 + _O2 = _H20

2H2 + O2 —> 2H2O

Explanation:

H2 + O2 —> H2O

The equation can be balance as follows:

There are 2 atoms of O on the left side of the equation and 1atom on the right side. It can be balance by putting 2 in front of H2O as shown below:

H2 + O2 —> 2H2O

Now, there are 4 atoms of H on the right side and 2 atoms on the left side. It can be balance by putting 2 in front of H2 as shown below:

2H2 + O2 —> 2H2O

Now the equation is balanced as the numbers of the atoms of the different elements present on both sides are the same