kellijohnson49 kellijohnson49 17-03-2021 Chemistry contestada CH4+2 O2-> CO2 + 2 H2O You burned 15.0 grams of methane (CH4) in an excess of oxygen and formed 23.8 grams of water. What was your percent yield, rounded to 3 sig-figs? C= 12.001 g/mol H= 1.008 g/mol O= 16g/mol