Tuesday, May 13th: “A” Day
Wednesday, May 14th: “B” Day
Agenda
Chapter 7 Review Review
Chapter 7 Jeopardy Review
Next time:
Concept Review due
Chapter 7 Test
Chapter 7 Review
2. What term is used to describe the mass
in grams of 1 mol of a substance?
Molar Mass
Chapter 7 Review
35. How many atoms of gold are there in a pure gold
ring with a mass of 10.6 g?
10.6 g Au X 1 mole Au = .0538 moles Au
196.97 g Au
.0538 moles Au X 6.022 X 1023 atoms Au
1 mole Au
3.24 x 1022 atoms Au
Chapter 7 Review
45. Find the molar mass of the following compounds:
c) Potassium dichromate
K1+
Cr2O7 2-
K2Cr2O7
K:
2(39.10) = 78.20
+ Cr: 2(52.00) = 104.00
O: 7(16.00) = 112.0
294.20 g/mol
Chapter 7 Review
45. Find the molar mass of the following
compounds:
d) Magnesium nitrate
Mg2+ NO31Mg(NO3)2
Mg: 24.31 = 24.31
+ N: 2(14.01) = 28.02
O: 6(16.00) = 96.00
148.33 g/mol
Chapter 7 Review
50. An oxide of phosphorus is 56.34% phosphorus,
and the rest is oxygen. Calculate the empirical
formula for this compound.
56.34 g P X 1 mol P = 1.819 mol P = 1 mol P (2)
30.97 g P
1.819
2 mol P
43.66 g O X 1 mol O = 2.729 mol O = 1.5 mol O (2)
16.00 g O
1.819
P2O3
3 mol O
Chapter 7 Review
51. The empirical formula of the anticancer
drug altretamine is C3H6N2. The
experimental molar mass is 210 g/mol.
What is the molecular formula?
C: 3(12.01) = 36.03
+ H: 6(1.01) = 6.06
N: 2(14.01) = 28.02
70.11 g/mol
3(C3H6N2) =
210 = 3
70.11
C9H18N6
Jeopardy Teams
2A
Team #1: Megan, Chris, Emily, Taylor, Jordan
Team #2: Connor, Colleen, Ben, Desiree,
Rachael
Team #3: Paityn, Zendra, Jake, Ashley, Tabitha
Team #4: Austin, Drew, Krits, Lauren, Allie
Team #5: Stephanie, Jackie, Lydia, Brooke,
Mya
Jeopardy Teams
4A
Team #1: Troy, Cody, Anna, Daleah
Team #2: Jordan, Rebecca, Abby
Team #3: Josh, Ashley, Sarah
Team #4: Morgan, Eric, Brook
Team #5: Tate, Mason, Korey
Jeopardy Teams
1B
Team #1: Autumn, Ashley, Kyle, Morgon
Team #2: Christian, Allie, Hunter, Kelsey
Team #3: Alyssa, Andy, Rachel M., Krysta
Team #4: Phoenix, Emily, Mason, Whitney
Team #5: Rachel D., Sydney, Michael
Jeopardy Teams
3B
Team #1: Kellie, RJ, Tom, Allysa
Team #2: Merik, Danika, Michelle, Holly
Team #3: Kenzie, Justin, Adam, Kaitlyn
Team #4: Hunter, Molly, Eryn, Noah
Team #5: Shelby, Dylan, Alexandra
Chapter 7
“The Mole &
Chemical
Composition”
THE RULES:
 There will be 5 teams
 Mrs. Elfline’s decisions are final
– that means no whining!
Each member of the winning team
will receive $1 mole money
And now…here is the host of
Jeopardy…
Mrs. Elfline
Let’s Get Ready to play…
Today’s Categories are:
Definitions
This ‘n That
Calculations
Calculations
Rebus Puzzles
Definitions
This ‘n That
Calculations
Calculations Rebus Puzzles
$100 $100 $100 $100 $100
$200 $200 $200 $200 $200
$300 $300 $300 $300 $300
$400 $400 $400 $400 $400
$500 $500 $500 $500 $500
FJ
The number of atoms in 1 mole of
any pure substance
Answer…
Avogadro’s Number
OR
6.022 X 1023
100
The unit for molar mass
Answer…
g/mole
OR
grams per mole
200
What 2 things does a chemical
formula tell you?
Answer…
1. What elements are in a
compound
2. How many atoms of each
element are in a compound
300
A formula that shows the simplest
whole-number ratio of the atoms in
a compound
Answer…
Empirical Formula
400
What are isotopes?
Answer…
Atoms of the same element that
have different number of neutrons.
500
Which has more atoms:
1 mole of gold or 1 mole of silver?
Answer…
They both have the same number
of atoms, 6.022 X 1023
100
How many hydrogen atoms are
there in 1 molecule of ammonium
carbonate, (NH4)2CO3?
Answer…
8
200
To find the molecular formula from
the empirical formula, you need to
calculate…
Answer…
The Molar Mass of the Empirical
Formula
300
As the atomic masses of the
elements in the periodic table
decreases, the number of atoms in
one mole of the element…
Answer…
Stays the same
1 mole = 6.022 X 1023 atoms of
ANY element
400
If a compound has a molecular
formula of X2Y4, what is it’s
empirical formula?
Answer…
XY2
500
How many atoms are present in
2.5 moles of aluminum, Al?
Answer…
1.5 X 1024 atoms Al
100
How many moles of gold are present in
150 grams of Au?
Answer…
.76 moles Au
200
A compounds empirical formula is
BH3. If the experimental molar
mass is 27.67 g/mole, what is the
molecular formula?
Answer…
B2H6
300
What is the percentage
composition of HCl?
Answer…
2.77 % Hydrogen
97.23 % Chlorine
400
Calculate the molar mass of
calcium nitrate, Ca(NO3)2.
Answer…
164.10 g/mole
500
Calculate the molar mass of
titanium(IV) oxide, TiO2.
Answer…
79.87 g/mole
100
What is the mass (in grams) of
5.600 moles of sodium, Na?
Answer…
128.7 grams Na
200
Calculate the average atomic
mass of rubidium if 72.17% of its
atoms have a mass of 84.91 amu
and 27.83% of its atoms have a
mass of 86.91 amu.
Answer…
85.47 amu
300
What is the percentage
composition of quartz, SiO2?
Answer…
46.75 % Si
53.25 % O
400
What is the empirical formula for a
compound that is 33.36 % calcium,
26.69 % sulfur, and 40.00 %
oxygen?
Answer…
CaSO3
500
Answer…
Scrambled Eggs
100
Answer…
Forgive and forget
(4 give/ 4 get)
200
Answer…
No U turn
300
Answer…
Diamond in the rough
400
Answer…
Missing you
(U)
500
Daily Double
How much do you want
to wager?
Daily Double
FINAL
JEOPARDY
CATEGORY:
Rebus Puzzles
How much do you want
to wager? Proceed…
Proceed…
You are full of baloney!
(below knee)
Proceed…
Thanks for
PLAYING!