Zinc oxide is ZnO and there is one zinc atom, one oxygen atom and no hydrogen atom.
Hydrogen oxide (also known as water) contains two hydrogen atoms and one oxygen atom in each molecule.
hydrogen oxide is water or H2O and has two hydrogens
2
Hydrogen peroxide has two atoms of hydrogen and oxygen.
Many, many compounds contain either hydrogen atoms, oxygen atoms, or both. Far too many to list here, in fact.Most prominently water and hydrogen peroxide both contain nothing but oxygen and hydrogen atoms.
3 Hydrogen and 2 Oxygen
A total of two hydrogen atoms can bond to a single oxygen atom.
The number of hydrogen atoms is twice the number of oxygen atoms. Glucose is C6H12O6, so there are 12 hydrogen atoms for every 6 oxygen atoms in a molecule.
Oxygen atoms weigh more than Hydrogen atoms.
The oxide Fe2O3 has 3 oxygen atoms in the molecule.
2 atoms of hydrogen for every atom of oxygen.
2x2= 4 hydrogen atoms (2x1= 2 oxygen atoms).