What volume (in L) of carbon dioxide will be produced from the reaction of 11.8L of ethane

Volume (in L) of Carbon dioxide : 23.6 L

Avogadro's hypothesis:  

In the same T,P and V, the gas contains the same number of molecules  

So the ratio of gas volume will be equal to the ratio of gas moles  

Combustion of ethane :

mol ratio of C₂H₆ : CO₂ ⇒ 2 : 4

so the volume of CO₂ :

the product of the pressure and volume is also constant