Is 2h + o2 →2h2o a balanced chemical equation? is it obeying the law of conservation of matter? no, the equation is not balanced. neither the hydrogen (h) nor the oxygen (o) are balanced. no, the equation is not balanced. the oxygen (o) is not balanced, but the hydrogen (h) is. yes, the equation is balanced. the hydrogen (h) and oxygen (o) atoms are equal on each side of the equation. no, the equation is not balanced. the hydrogen (h) is not balanced, but the oxygen (o) is.