Mole concept Important thing is first you know about Gram Atomic Mass Gram Molecular Mass Main thing is that you should learn Atomic masses Approx from 1 to 20. The image i given for learn Atomic masses. Gram atomic masses - The amount of a substance whose mass in grams is numerically equal to its atomic mass, is called gram atomic mass of that substance. For Example- Atomic mass of oxygen, O = 16u so, Gram atomic mass of oxygen , O = 16g Gram molecular mass- The amount of a substance whose mass in grams is numerically equal to its molecular mass, is called gram molecular mass of that substance. For Example- Molecular mass of oxygen, O = 32u so, Gram Molecular mass of oxygen , O = 32g So understand all above topic then you will learn mole concept. Mole-...