Atoms and molecules

Atoms and molecules

33.Mass of 1 mole of a substance is called its molar mass

34.Atoms of different elements are of different sizes and masses. A mole of one type of atoms will have a different mass from a mole of another type of atoms

35.  Molar mass = Mass of one mole of any substance  = Gram atomic mass or gram molecular mass or gram formula mass of the substance

36.  Number of moles = Given number of  particles/Avogadro’s number

37.Molar mass is expressed in g/mol

38. Atomic mass of an element  expressed in grams is called gram atomic mass

39.Molecular mass of a substance expressed in grams is called gram molecular mass

40.Mass of one mole of atoms of any element is equal to gram atomic mass of that element 

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