dommm01 dommm01 Today at 4:48 AM Chemistry Answered Given the following chemical reaction: 2 O2 + CH4 --> CO2 + H2O What mass of oxygen is required to completely react with 20 grams of CH4? A) 10 grams O2 B) 20 grams O2 C) 80 grams O2 D) 144 grams O2