関連ワード:  mole fraction define class 12    mole fraction definition class 12 chemistry    mole fraction definition class 12 ncert    mole fraction definition and formula class 12    mole fraction class 12    mole fraction class 12 chemistry    mole fraction class 12 formula    mole fraction class 12 questions    define mole fraction class 12 short answer    define mole fraction class 12 formula