<p>When a certain amount of ethylene was burnt 6226 kJ heat was evolved. If heat of combustion of ehtylene is 1411 kJ, the volume of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>O</mi><mn>2</mn></msub></math>(at NTP) that entered into the reaction is:</p>