Answer :
It would be number three, though the official writing of the equation would be 2H2 + O2 → 2H2O + heat
Answer: The balanced chemical equation is written above.
Explanation:
A balanced chemical equation always follow law of conservation of mass.
This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form. This also means that total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.
The balanced chemical equation for the reaction between hydrogen gas and oxygen gas follows:
[tex]2H_2+O_2\rightarrow 2H_2O+\text{heat}[/tex]
By stoichiometry of the reaction:
2 moles of hydrogen gas and oxygen gas to produce 2 moles of water and releases heat.
Hence, the balanced chemical equation is written above.