# Question #78803

Mar 13, 2017

$2 {H}_{2} + 1 {O}_{2} = = 2 {H}_{2} O$

#### Explanation:

Oxygen comes in a binary molecule ${O}_{2}$

Water ( Hydrogen oxide ) has only 1 Oxygen atom
So it takes two water molecules to equal the 1 Oxygen molecule.

Two water molecules contain 4 Hydrogen atoms.

Hydrogen also comes in a binary molecule ${H}_{2}$
so it takes two Hydrogen molecules to equal 4 Hydrogen atoms.

hence

$2 {H}_{2} + 1 {O}_{2} = = 2 {H}_{2} O$