Haliak Haliak 17-05-2018 Chemistry contestada Which of these is a balanced chemical equation? A) CO(g) + O2(g) → CO2(g) B) CO(g) + 2O2(g) → 2CO2(g) C) 2CO(g) + O2(g) → 2CO2(g) D) 2CO(g) + 2O2(g) → 2CO2(g)