関連ワード:  is oxygen a compound element or mixture    is o2 a compound element or mixture    is oxygen gas a compound element or mixture    is liquid oxygen a element compound or mixture    is oxygen a compound element heterogeneous mixture or homogeneous mixture    is oxygen o2 an element compound or mixture    is oxygen dioxide an element compound or mixture    is oxygen gas a element compound homogeneous mixture or heterogeneous mixture  
結果 : is oxygen a compound element or mixture