How do you write a balanced chemical equation for the combustion of #C_2H_2#?
Complete combustion of hydrocarbons ALWAYS results in the formation of carbon dioxide and water:
And when we combust a hydrocarbon, to represent the equation, typically we would balance the carbons, and then the hydrogens, and then the oxygens......so..........
And now balance the equation with respect to oxygens;
If you like, you can double the entire equation to get rid of the half-integral coefficient. The arithmetic is generally easier if you use it in the given form. The use of half-integral coefficients for binuclear molecules has long precedent.
Can you likewise represent complete combustion of