Answer:
6 Hydrogen Atoms
Step-by-step explanation:
The balance chemical equation is as follow is as follow,
N₂ + 3 H₂ → 2 NH₃
According to this equation, one molecule of Nitrogen when reacted with 3 molecules of Hydrogen (Reduction reaction) produces two molecules of Ammonia.
Hence, as one molecule of NH₃ contains three Hydrogen atoms then 2 NH₃ will contain six Hydrogen atoms.