Chemistry Chapter 11 The Mole

Counting “Terms” Dozen Baker’s Dozen Pair Ream Gross

Chemistry Counting “term” The Mole (mol) 6.02 x 1023 Avogadro’s Number SI unit for measuring the amount of a substance # of atoms in 12 grams of pure Carbon-12

6.02 x 1023 602,000,000,000,000,000,000,000 1 mol of water = 18 ml 1mol of pennies = stack the pennies – the stack could reach to the sun and back 2 billion times 1 mol of dollars = could not all be spent even if you spent a billion dollars a day over a trillion years 1 mol paperclips – could wrap around the world 400 trillion times

Conversions Moles to Particles Ex. P. 311

Conversions Particles to moles Ex. Page 312

Conversions The mass in grams of one mole of any pure substance is called its “molar mass” Molar mass of any element equals its atomic mass Unit = g/mol Ex. 1 mol Fe = 55.845 grams 1 mol NaCl = 22.99 + 35.453 = 58.443

Conversions Mol to mass Ex. P. 316

Conversions Mass to mol Ex. P 316