1. MOLE CONVERSIONS
Which conversion factors allow you to convert from mass to moles and from particles to moles.
molar mass (g) .
1 mol ‏
6.022 x 1023 particles . .
1 mol
MOLE
(mol)‏
Particles
(atoms,m’c or f.u.)
Mass
(g)‏
1 mol
molar mass (g)‏
1 mol
6.022 x 1023 particles
Which conversions factors allow you to convert from moles to grams and/or particles?

2. Avogadro Memes…

3. Mole Meme & Mole Photos

4. Read 8.4 & 8.5 #’s 12,14,17,20cd Chapter 8 Quiz on Thurs 3/2
HOMEWORK
Read 8.4 & 8.5
#’s 12,14,17,20cd
Chapter 8 Quiz on Thurs 3/2
covering

5. QUICK SUMMARY the mole is a chemist’s bridge out of the atomic world (amu) into the real world (g)!
Atomic Mass vs Molar Mass
6.022x1023 particles
H2 = _______
H2O = ________
MgSO4 = ________
(NH4)3PO4 = ________
2 amu
18 amu
120 amu
149 amu
H2 = _____
H2O = _____
MgSO4 = _____
(NH4)3PO4 = _____
2 g
18 g
120 g
149 g

6. ( )‏ M P aluminum sulfate How many moles of are in 6.29 x 1024
f.u.?
Al3+
SO42–
mole
Al2(SO4)3 M P ( )‏
1 mol Al2(SO4)3
6.29 x 1024 f.u. Al2(SO4)3
= mol
6.022 x 1023 f.u. Al2(SO4)3
Al2(SO4)3

7. ( )‏ M P How many formula units is 3.15 mol of iron (III) hydroxide?
mole
Fe3+
OH1–
Fe(OH)3 M P ( )‏
3.15 mol Fe(OH)3
6.022 x 1023 f.u. Fe(OH)3
= x 1024
1 mol Fe(OH)3
f.u. Fe(OH)3

8. Nitric Acid MOLAR MASS PRACTICE… Ammonium Phosphate # # (NH4)3PO4 HNO3
Element
MM (g)
Total (g) 1 H
1.01 N
14.01 3 O
16.00
48.00
TOTAL MOLAR MASS
63.02 #
Element
MM (g)
Total (g) 3 N
14.01
42.03 12 H
1.01
12.12 1 P
30.97 4 O
16.00
64.00
TOTAL MOLAR MASS
149.12
Nitric Acid
Ammonium Phosphate

9. ( )‏ # M P What’s the mass of 1.29 mol ? iron (II) nitrate
mole
Fe2+
NO31–
Fe(NO3)2 M P ( )‏
g Fe(NO3)2
1.29 mol Fe(NO3)2
= g Fe(NO3)2
1 mol Fe(NO3)2 #
Element
MM (g)
Total (g) 1 Fe
55.85 2 N
14.01
28.02 6 O
16.00
96.00
TOTAL MOLAR MASS
179.87
MOLAR MASS of Fe(NO3)2
1 formula unit of
Fe(NO3)2 contains...
1 iron atom
2 nitrogen atoms
6 oxygen atoms

10. ( )‏ # M P How many mol are in 37.5g of ? potassium nitrate
K1+
NO31–
KNO3
mole M P ( )‏
1 mol KNO3
37.5 g KNO3
= mol KNO3
g KNO3 #
Element
MM (g)
Total (g) 1 K
39.10 N
14.01 3 O
16.00
48.00
TOTAL MOLAR MASS
101.11
MOLAR MASS of KNO3
1 formula unit of
KNO3 contains...
1 potassium atom
1 nitrogen atom
3 oxygen atoms