1. Warm-Up! (Day1) Find the Molar Masses of 1. CH 4 2. Sodium Hydrogen Carbonate 3. Jelly beans if 1 jelly bean weighs 0.5 g

2. Mole Conversions # - mole - mass

3. How many molecules are in 700g of sugar? Hard to count tiny individual molecules → Count by Weighing (measuring mass is easier than counting #) → Convert the Mass into the Mole, and then into the # of molecules

4. The mole can act as a bridge # of things (Atoms or Molecules) Grams Molar Mass6.02 x 10 23

5. Fence Diagram = what you want Put “1” in front of “moles” “6.02 x 10 23 ” in front of “atoms / molecules” “Molar Mass” in front of “grams” What you haveUnits of what you want Units of what you have

6. Practice!

7. 5. How many formula units are present in 56.2 g of NaCl? 6. How many grams are 2.28 x 10 23 molecules of NH 3 ?

8. Mole Conversions 1 (Name:______ Per:__) 1. How many molecules are in 6 moles of CO 2 ? 2. How many moles are in 1.5 x 10 24 Carbon atoms? 3. How many grams are in 4 moles of N 2 ? 4. How many moles are in 4.04 g of H 2 ? 5. How many grams are in 5.02 x 10 23 CH 2 O molecules? 6. How many molecules are present in 453.6 g of NH 4 NO 3 (ammonium nitrate)?