2Na + 2H2O -> 2NaOH + H2
As a rule of thumb, if elemental hydrogen is in a reaction and it's NOT reacting with a metal, it's the reducing agent.
The compound which you call nitrogen trihydride is much better known as ammonia, and the formula is NH3.
The balanced chemical equation for magnesium strip reacting with KCl is: 2Mg(s) + 2KCl(aq) → 2K(s) + MgCl2(aq)
2HCl + Mg ---------> MgCl2 + H2 Hydrogen chloride + Magnesium -------> Magnesium Chloride + Hydrogen gas
Ca(NO3)2 + 2Li --> 2LiNO3 + Ca 2+
The balanced equation for sodium reacting with water to yield sodium hydroxide and hydrogen gas is: 2Na(s) + 2H2O(l) -> 2NaOH(aq) + H2(g)
The balanced chemical equation for zinc reacting with water to form zinc hydroxide and hydrogen gas is: Zn + 2H2O -> Zn(OH)2 + H2
The balanced symbol equation for hydrogen peroxide (H2O2) reacting with manganese dioxide (MnO2) is: 2H2O2 + MnO2 -> 2H2O + O2 + Mn
The balanced equation for ferric chloride (FeCl3) reacting with sodium hydroxide (NaOH) is: FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
Caesium + water ------> Caesium hydroxide + Hydrogen
Balanced:H2 + I2 ----> 2 HI
The balanced chemical equation for hydrogen reacting with chlorine to form hydrogen chloride is: H2 + Cl2 → 2HCl.
The balanced symbol equation for copper II oxide reacting with hydrogen is Cu + H2O. This reaction will create copper and water as a result.
The word equation for sodium reacting with water is: sodium + water → sodium hydroxide + hydrogen gas.
The balanced equation for iron sulfate (FeSO4) reacting with sodium hydroxide (NaOH) to form iron hydroxide (Fe(OH)3) and sodium sulfate (Na2SO4) is: FeSO4 + 2NaOH → Fe(OH)3 + Na2SO4
The balanced equation for potassium hydroxide (KOH) reacting with sulfuric acid (H2SO4) to form potassium sulfate (K2SO4) and water (H2O) is 2KOH + H2SO4 → K2SO4 + 2H2O.
There is no reaction between zinc hydroxide and sodium hydroxide.