How many atoms are in 2H20

To determine the number of atoms in a molecule, we need to look at the chemical formula. In this case, 2H2O represents two water molecules.

Each water molecule (H2O) consists of 2 hydrogen atoms (H) and 1 oxygen atom (O). Therefore, two water molecules will have:

2 H atoms/molecule * 2 molecules = 4 hydrogen atoms
1 O atom/molecule * 2 molecules = 2 oxygen atoms

So, there are 4 hydrogen atoms and 2 oxygen atoms in 2H2O, resulting in a total of 4 + 2 = <<4+2=6>>6 atoms.