1. Bell Ringer Convert 6.3 grams of Ag to moles. Ag atomic mass is 107.8682 Convert 7 moles of Kr to grams. Kr atomic mass is 83.798 How many cm are in one meter? How many km are in 1200 meters? Draw what Niels Bohr purposed the atom to look like and what was this model called?

2. Converting with Avogadro's Number Mr. Schlamb

3. Review Avogadro’s number: 6022*10^23 This is the number of atoms in one mole of substance

4. Conversions We can do conversions with Avogadro’s number. We can use Avogadro’s number of atoms of an element from moles We can also use it to find the amount of element in moles from atoms

5. See the book Open the book to page 86 and 87 In the first problem we are finding the amount in moles of Ag from the number of atoms. Lets work this together on the board

6. Next problem In the next problem we are finding the mass in grams of Cu from the amount of atoms of Cu Lets work this one together on the board as well

7. Questions