Warm Up 2.2 1. Blue sheet 10, 11, & 12 2. How many protons, electrons, and neutrons are in: 119 50 Sn2- 3. Describe the Gold Foil Experiment 4. Lake Michigan.

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Presentation transcript:

Warm Up 2.2 1. Blue sheet 10, 11, & 12 2. How many protons, electrons, and neutrons are in: 119 50 Sn2- 3. Describe the Gold Foil Experiment 4. Lake Michigan holds 1.3 x 1015 gallons of water. How much is this in GL? ( 1 gallon = 37.9 dL)

119 50 Sn2- 2. 3. 4.

1. What do the following words mean? 1.Pair 2. Couple 3. Peck 4. Dozen 5. Bushel 6. Gross 7. Ream 8. Mole

What do the following words mean? 1.Pair – 2 things 2. Couple- 2 people 3. Peck – 10.5 pounds 4. Dozen- 12 things 5. Bushel- 42 pounds 6. Gross- 144 (12-12packs) 7. Ream- 500 sheets of paper

All are words that represent a numerical value.

1 Mole= 6.02 x 1023 atoms

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Practice: Determine the molar mass for the following: Fe 55.85 g/mole P 30.97 g/mole Ca 40.08 g/mole 4. Ba 137.33 g/mole

How many grams are in 2.9 moles of iron? Given: Want? Need: Work: Answer:

How many moles are in 62.45 grams of calcium? Given: Want? Need: Work: Answer:

Mixed practice How many atoms are in 6.755 moles Lead? How many moles are in 152.1 grams of sulfur ?