Question

Question #78803

Answer 1

`2 H_2 + 1 O_2 == 2 H_2O`

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_2O`