Give the percent yield when 28.16 g of CO2 are formed from the reaction of 4.000 moles of C8H18 with 4.000 moles of O2

2 C8H18 plus 25 O2 arrow 16 CO2 plus 18 H2O

25.00 percent
12.50 percent
20.00 percent
50.00 percent?