Ammonium chloride
Na+H2o+H2=2 Nhoh
H2 - hydrogen.
H2. Hydrogen gas.
NaCl + H2.
2Na + 2H2O -> H2 + 2NaOH
2Na + 2H2O -------> 2NaOH + H2
Ammonia
The net ionic equation is Zn + 2H+ --> Zn2+ + H2
There are 2 sulfur atoms in the chemical reaction H2S plus SO2 plus H2.
H2+ has a stronger bond than H2. The addition of a positive charge to the H2 molecule increases the attraction between the two hydrogen atoms, resulting in a stronger bond.
2 k + h2so4 = k2so4 + h2