The molecule that shows two atoms of hydrogen (H) is:
2H2O
This indicates that there are two molecules of water (H2O), each containing two hydrogen atoms, resulting in a total of four hydrogen atoms. If you are looking for a single molecule with two hydrogen atoms, then H2O (which is part of 2H2O) would also be an example. However, since we are looking at the options provided, 2H2O clearly indicates the presence of two atoms from each water molecule.