how many hydrogen atoms are present in the molecule?
As you can see from its molecular formula, there are two Hydrogen atoms in a molecule of Hydrogen. In one mole of Hydrogen gas,there would be6. 02×10^23molecules. In every molecule, there are two atoms, so the number of atoms in 1 mol of hydrogen would be (6.02×10^23)×2=12.04×10^23 atoms.