Hydrogen is naturally H2 so when you combine two H2 molecules, you will get 2H2. It won't be H4 as it will only exist in pairs, not fours.
If you are combining H + H, you will get H2
So either: H+H → H2
Or H2 + H2 → 2H2
Note, hydrogen chloride is usually known as hydrochloric acid. The equation is extremely simple. H2 + Cl2 = 2HCl.
When bromine reacts with hydrogen, it forms hydrogen bromide. The balanced chemical equation for this reaction is Br2 + H2 → 2HBr.
The balanced equation is: 4H₂ + 4NO → 4H₂O + 2N₂.
The equation represents the reaction between methane (CH4) and bromine (Br2) to form methyl bromide (CH3Br) and hydrogen bromide (HBr). This reaction is a substitution reaction in which a hydrogen atom in methane is replaced by a bromine atom.
Hydrogen peroxide (H2O2) is the substrate in the given equation. It is broken down into water (H2O) and oxygen (O2) by the enzyme catalase.
HI
The word equation for hydrogen chloride plus sodium hydroxide is hydrochloric acid plus sodium chloride.
hydrogen peroxide
This equation is:Mg + H2SO4 = MgSO4 + H2
The balanced chemical equation for hydrogen reacting with chlorine to form hydrogen chloride is: H2 + Cl2 → 2HCl.
The balanced equation for carbon plus water yielding carbon monoxide plus hydrogen is: C + H2O → CO + H2. This equation represents the reaction where carbon reacts with water to produce carbon monoxide and hydrogen gas. The equation is balanced with 1 carbon atom on each side and 2 hydrogen atoms on each side.
H2o+no2
Note, hydrogen chloride is usually known as hydrochloric acid. The equation is extremely simple. H2 + Cl2 = 2HCl.
ITs a massive dildo or phone 118
The word equation for silver reacting with water is "silver + water → silver oxide + hydrogen gas."
When bromine reacts with hydrogen, it forms hydrogen bromide. The balanced chemical equation for this reaction is Br2 + H2 → 2HBr.
HCl + NaOH = NaCl + H2O