Question

can anyone please explain why the formula of water is H2O

Answer 1

The chemical composition of water has 2 atoms of hydrogen(h) in a molecule of water and 1 atom of oxygen.

Answer 2

Hydrogen and Oxygen molecules in the water are found in the ratio of 2:1 . That means water contains two atoms of hydrogen and one atom if Oxygen . So , the molecular formula of water becomes H2O