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The Mole. Molar Conversions. VERY. A large amount!!!!. A. What is the Mole?. A counting number (like a dozen) Avogadro’s number (N A ) 1 mol = 6.02  10 23 items. This is the fundamental definition of what one mole is:.

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Molar Conversions

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The Mole

## Molar Conversions

VERY

A large amount!!!!

### A. What is the Mole?

• A counting number (like a dozen)

• Avogadro’s number (NA)

• 1 mol = 6.02  1023 items

### This is the fundamental definition of what one mole is:

• One mole contains as many “entities” (things) as there are atoms in 12 grams of carbon-12.

• One mole of carbon-12 contains

6.02 x 1023 atoms of carbon-12.

### A. What is the Mole?

HOW LARGE IS IT???

• 1 mole of pennies would cover the Earth 1/4 mile deep!

• 1 mole of hockey pucks would equal the mass of the moon!

• 1 mole of basketballs would fill a bag the size of the earth!

### B. Molar Mass

• Mass of 1 mole of an element or compound.

• Atomic mass tells the...

• atomic mass units per atom (amu)

• grams per mole (g/mol)

12.01 g/mol

26.98 g/mol

65.39 g/mol

• carbon

• aluminum

• zinc

### B. Molar Mass Examples

• water

• sodium chloride

• H2O

• 2(1.01) + 16.00 = 18.02 g/mol

• NaCl

• 22.99 + 35.45 = 58.44 g/mol

### B. Molar Mass Examples

• sodium bicarbonate

• sucrose

• NaHCO3

• 22.99 + 1.01 + 12.01 + 3(16.00) = 84.01 g/mol

• C12H22O11

• 12(12.01) + 22(1.01) + 11(16.00) = 342.34 g/mol

MASS

IN

GRAMS

MOLES

NUMBER

OF

PARTICLES

molar mass

6.02  1023

(g/mol)

(particles/mol)

### C. Molar Conversion Examples

• How many moles of carbon are in 26 g of carbon?

26 g C

1 mol C

12.01 g C

= 2.2 mol C

### C. Molar Conversion Examples

• How many moles of sodium chloride are in 26 g of sodium chloride?

26 g NaCl

1 mol NaCl

58.44 g NaCl

= 0.44 mol

NaCl

### C. Molar Conversion Examples

• How many moles of magnesium fluoride are in 85 g of MgF2?

85 g MgF2

1 mol MgF2

62.31 g MgF2

= 1.36 mol MgF2

MASS

IN

GRAMS

MOLES

NUMBER

OF

PARTICLES

molar mass

6.02  1023

(g/mol)

(particles/mol)

### C. Molar Conversion Examples

• How many molecules are in 2.50 moles of C12H22O11?

6.02  1023

molecules

1 mol

2.50 mol

= 1.51  1024

molecules

C12H22O11

### C. Molar Conversion Examples

• How many molecules are in 2.50 moles of C2H6?

6.02  1023

molecules

1 mol

2.50 mol

= 1.51  1024

molecules

C2H6

### C. Molar Conversion Examples

• Find the mass of 2.1  1024 molecules of NaHCO3.

2.1  1024

molecules

1 mol

6.02  1023

molecules

84.01 g

1 mol

= 290 g NaHCO3

### C. Molar Conversion Examples

• How many atoms are in 10 grams of NaCl.

1 mol

58.44 g NaCl

6.021023 atoms NaCl

1 mol

10 g NaCl

= 1.03x 1023 atoms NaCl

### MOLE DAY FUNNIES

• Q: What did Avogadro teach his students in math class?

• Moletiplication

### Q: What kind of fruit did Avogadro eat in the summer?

• A: Watermolens

### Why was there only one Avogadro?

• When they made him, they broke the Moled

Oil of Molay