6.3 The Mole “A Chemists Dozen”

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 1 hour = 1 dollar = 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities Because atoms and molecules are so small, chemists established their own counting unit – the mole

The Mole – A Chemists Dozen 1 dozen = 12 items 1 six-pack = 6 cans 1 hour = 60 minutes 1 dollar = 100 cents 1 mole = 602,000,000,000,000,000,000,000 entities This value, 6.02 x 1023, is called Avogadro’s constant (NA) after the Italian physicist

What is a Mole? Mole (n): The SI base unit for an amount of substance Symbol: mol 1 mol = 6.02 x 1023 entities of a substance We use a really really big number to measure really really small things!

The Mole Although the mole represents a large number, a mole of atoms, ions or molecules is observable and convenient to measure 1 mol of sugar = 180 g 1 mol of NaCl = 58.44 g 1 mol of carbon = 12.01 g

Read section 6.2 Questions p. 270 #1-6 Homework Read section 6.2 Questions p. 270 #1-6