1. Entry Task: Block 1 Feb 1st- 2nd Block 2
Entry Task Question:
WRITE THE QUESTION DOWN!
How many moles are in 2.57 x1048 molecules of phosphorus dioxide?

2. Agenda: Sign off and discuss Mole Particle ws
Mole notes #2 MolesGrams
HW: MolesGrams ws

3. I can … Calculate the number of moles in a given mass
Calculate the number of moles  particles.
Calculate the molar mass of a compound.

5. Place starting amount here
Moles Particles
How many atoms are in 4.31 moles of carbon?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
4.31 moles of C
6.02 x 1023 atoms
= x atoms C
1 mole of C
3 Sig Figs and Sci notation!!!
Place conversion here
= 2.59 x atoms C

6. Place starting amount here
Moles Particles
How many moles are in a 5.55 x 1037 formula units of zinc II phosphate
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
1 mole of Zn3(PO4)2
5.55 x1037 fu Zn3(PO4)2
= x1014 moles
Subtract exponents
6.02 x 1023 fu Zn3(PO4)2
Place conversion here
3 Sig Figs and Sci notation!!!
= 9.22 x1013 moles of Zn3(PO4)2

7. Place starting amount here
Moles Particles
How many moles are in a 9.25 x 1058 atoms of gold?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
9.25 x1058 atom Au
1 mole of Au
= 1.54 x1035 moles Au
6.02 x 1023 atoms
Subtract exponents
Place conversion here

8. Place starting amount here
Moles Particles
How many atoms are in 989 moles of magnesium?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
989 moles of Mg
6.02 x 1023 atoms
= 5950 x 1023 atoms Mg
1 mole of Mg
3 Sig Figs and Sci notation!!!
Place conversion here
= 5.95 x 1026 atoms Mg

9. Place starting amount here
Moles Particles
How many moles are in a 2.57 x 1048 molecules of phosphorus dioxide?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
2.57 x1048 molecules PO2
1 mole PO2
= x1025 moles
Subtract exponents
6.02 x 1023 molecules PO2
Place conversion here
= 4.27 x1024 moles

10. Place starting amount here
Moles Particles
How many atoms are in moles of iron III oxide?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
0.130 moles of Fe2O3
6.02 x 1023 atoms
= x 1023 atoms Fe2O3
1 mole of Fe2O3
3 Sig Figs and Sci notation!!!
Place conversion here
= 7.83 x 1022 atoms Fe2O3

11. Place starting amount here
Moles Particles
How many formula units are in 2.85 moles of lithium chlorate?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
2.85 moles of LiClO3
6.02 x 1023 f.u
= x fu of LiClO3
1 mole of LiClO3
3 Sig Figs and Sci notation!!!
Place conversion here
= 1.72 x 1024 f.u. of LiClO3

12. Place starting amount here
Moles Particles
How many moles are in a 5.50 x 1046 atoms of copper?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
1 mole of Cu
5.50 x1046 atoms Cu
= x1023 moles
Subtract exponents
6.02 x 1023 atoms Cu
Place conversion here
3 Sig Figs and Sci notation!!!
= 9.14 x1022 moles of Cu

13. Place starting amount here
Moles Particles
How many moles are in a 2.50 x 1031 molecules of water?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
1 mole of water
2.50 x1031 molecules of water
= x108 moles
Subtract exponents
6.02 x 1023 molecules of water
Place conversion here
3 Sig Figs and Sci notation!!!
= 4.15 x107 moles of water

14. Place starting amount here
Moles Particles
How many formula units are in moles of barium nitrate?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
0.364 moles of Ba(NO3)2
6.02 x 1023 f.u
= x fu of Ba(NO3)2
1 mole of Ba(NO3)2
3 Sig Figs and Sci notation!!!
Place conversion here

15. Mole Notes #2

16. Moles to Mass Conversions
A dozen feathers and a dozen eggs would not have the same mass. Neither would a mole of Hydrogen and a mole of zinc.
To get masses, use the atomic mass from the periodic table
The atomic mass represents the mass of 1 mole of that atom.
This would also be known as its molar mass.

17. Moles to Mass Conversions
Practice: Use your atomic mass on the periodic table as its molar mass.
What is the atomic mass of carbon?
12.01 grams
What is the mass of 1 mole of carbon?
12.01 grams
What is the atomic mass of sodium?
22.9 grams
What is the mass of 1 mole of sodium?
22.9 grams

18. Molar Mass What is the molar mass of Water- H2O
Hydrogen = X 2 = grams
Oxygen = X 1 = grams
H2O molar mass = grams for 1 mole

19. Molar Mass Lead II nitrate What is the molar mass of lead II nitrate?
Pb +2
NO3 -1
NO3 -1
Pb(NO3)2
Pb= g X 1 = g
N= g X 2 = g
O= g X 6 = g
grams for 1 mole of Pb(NO3)2

20. So the molar mass of compound/molecule/atoms/ions is the same as its mass in 1 mole OR x1023 compounds/molecules/atoms/ions.

21. Moles Grams How many grams would be in 2.0 moles of water?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
2.0 moles of water
18 grams
= 36 grams of water
1 mole of water
= 3.6 x101 grams of water
Place conversion 1mole = molar mass

22. Moles Grams How many grams would be in 0.65 moles of water?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
0.65 moles of water
18 grams
= 11.7 grams of water
1 mole of water
= 1.2 x101 grams of water
Place conversion 1mole = molar mass

23. GramsMoles How many moles would be in 0.65 grams of water?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
0.65 grams of water
1 mole of water
= moles of water
18 grams
= 3.6 x10-2 moles of water
Place conversion 1mole = molar mass

24. GramsMoles How many moles would be in 75.0 grams of Lead II nitrate?
Stoichiometry- set up!
Place starting amount here
Place the units you want to get rid of diagonal from each other
75.0 grams of Pb(NO3)2
1 mole of Pb(NO3)2
= moles of Pb(NO3)2
grams
= 2.26 x10-1 moles of Pb(NO3)2
Place conversion 1mole = molar mass

25. Place starting amount here
GramsMoles
What if I have moles of Ammonium phosphate, how many grams would that be?
(NH4)3PO4
N= g X 3 = g
H= g X 12 = g
Place starting amount here
P= g X 1 = g
O= g X 4 = g
1 mole = grams
mole (NH4)3PO4
149 grams of (NH4)3PO4
= 101 grams of (NH4)3PO4
1 mole (NH4)3PO4
3 Sig Figs and Sci notation!!!
Place conversion here
= 1.01 X 102 grams of (NH4)3PO4

26. Place starting amount here
GramsMoles
What if I have 3.5 moles of Strontium chlorate, how many grams would that be?
Sr(ClO3)2
Sr= g X 1 = g
Place starting amount here
Cl= g X 2 = g
O= g X 6 = g
1 mole = grams
3.5 mole Sr(ClO3)2
255 grams of Sr(ClO3)2
= 891 grams of Sr(ClO3)2
1 mole Sr(ClO3)2
2 Sig Figs and Sci notation!!!
Place conversion here
= 8.9 x102grams of Sr(ClO3)2