1. Warm-up March 16th
What is the molar mass of:
KCl
CuSO4

2. Warm-up March 16th
What is the name of:
CF4
N2O6
SO2
P4O10

3. Warm-up –Happy St. Patrick’s Day!
5.6 mol H2= _____ g H2
4.56 X 1021 molec CO2 =___ mol CO2

4. The MOLE

5. Amedeo Avogadro
Italian physicist and lawyer who, in 1811, determined the volume of one mole of a gas
One mole = x 1023 representative particles
Avogadro’s number

6. A counting number (like a dozen) Avogadro’s number (NA)
A. What is the Mole?
A counting number (like a dozen)
Avogadro’s number (NA)
1 mol =  1023 items
A large amount!!!!
VERY
602,000,000,000,000,000,000,000

7. HOW LARGE IS IT???
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!
1 mole of pennies would cover the Earth 1/4 mile deep!

8. Molar Mass 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)
Round to 2 decimal places

9. carbon aluminum zinc 12.01 g/mol 26.98 g/mol 65.39 g/mol
Molar Mass Examples
carbon
aluminum
zinc
12.01 g/mol
26.98 g/mol
65.39 g/mol

10. Sodium chloride (NaCl)
Molar Mass Examples
water (H2O)
2(1.01) = g/mol
Sodium chloride (NaCl)
= g/mol

11. Sodium Bicarbonate (NaHCO3)
Molar Mass Examples
Sodium Bicarbonate (NaHCO3)
(16.00) = g/mol
Sucrose (C12H22O11)
12(12.01) + 22(1.01) + 11(16.00) = g/mol

12. Warm-up Happy St. Patrick’s Day !!!
Find the molar mass of:
Ca(ClO4)2
S2O5

13. 1 mole = 6.022 x 1023 particles; atoms, molecules or ions
Conversion Factors
1 mole = x 1023 particles; atoms, molecules or ions
1 mole = mass in grams of an element or compound
1 mole = 22.4 Liters of a gas at STP

14. Conversion Examples
How many moles of carbon are in 26 g of carbon?
26 g C =

15. How many molecules are in 2.50 moles of C12H22O11?
Conversion Examples
How many molecules are in 2.50 moles of C12H22O11?
2.5 mol C12H22O11

16. Conversion Examples 3.5 mol N2
What is the volume of 3.5 moles of N2 gas at STP?
3.5 mol N2

17. 2 step problems Find the mass of 2.1  1024 molecules of NaHCO3.
2.1  molec NaHCO3

18. What is the volume of 6.76 g of CO2 gas at STP?
Conversion Examples
What is the volume of g of CO2 gas at STP?
6.76 g CO2

19. Conversion Examples Find the mass of 4.5 x 1021 molecules of CO.
Find the volume of 100 g of NO2 at STP.
Find the number of molecules of 5.67 g of N2O4