The following reactions take place in a reactor, where CO is the undesired product: C2H6 +3.502-2002 + 3H20 C2H6 +2.502-200+ 3H2O The feed to reactor consists of 100 mol C2H6 and 500 mol O2. The product stream was analyzed and found to contain 20 mol C2H6, 120 mol CO2, 40 mol CO, 240 mol O2, and 240 mol H20. The reactor conversion is 80%. Calculate the selectivity Answer: 3