PPT Slide
Mole: convenient measure chemical quantities.
1 mole of something = 6.0221367 x 1023 of that thing.
Experimentally, 1 mole of 12C has a mass of 12 g.
Molar mass: mass in grams of 1 mole of substance (units g/mol, g.mol-1).
Mass of 1 mole of 12C = 12 g.