There are 3 moles of water formed in the complete combustion of ethane.
Combustion is a chemical reaction between substances , usually including oxygen and usually accompanied by the generation of heat and light in form of flame.
For example , the wood burning in a fireplace. The wood is a fuel which continuously react with oxygen in the air in a combustion reaction.
When ethane goes for combustion
reaction ,
C2H6+7/2 O2→2CO2+ 3H2O
As you can see on the above reaction 3 moles of water molecules are produced .
to learn More about Combustion Reaction click here https://brainly.com/question/15117038
#SPJ9