When 4 atoms of hydrogen react with 2 atoms of oxygen, they form water (H₂O).
The reaction can be represented as:
\[ 2H_2 + O_2 \rightarrow 2H_2O \]
In this reaction:
- 2 molecules of water are produced.
- Each molecule of water contains 2 hydrogen atoms and 1 oxygen atom.
Thus, for 2 molecules of water:
- Total hydrogen atoms = 2 molecules × 2 hydrogen atoms/molecule = 4 hydrogen atoms
- Total oxygen atoms = 2 molecules × 1 oxygen atom/molecule = 2 oxygen atoms
Adding these together gives:
- Total atoms in products = 4 hydrogen + 2 oxygen = 6 atoms.
Therefore, the answer is 6.