Grams
Moles
Stoichiometry Jeopardy
To
Molecules
Percent
Yield
Limiting
Reactants
“Stoiched”
About
Chemistry
Q $100
Q $100
Q $100
Q $100
Q $100
Q $200
Q $200
Q $200
Q $200
Q $200
Q $300
Q $300
Q $300
Q $300
Q $400
Q $400
Q $400
Q $400
Q $400
Q $500
Q $500
Q $500
Q $500
Q $500
Q $300
Final Jeopardy
$100 Grams<--> Moles
If you have 20.0g of
magnesium sulfate,
how many moles do
you have?
$100 Answer from Grams<-->
Moles
0.17 mol MgSO4
$200 Grams<--> Moles
How many grams of
aluminum oxide would
you have if you
started with .109
moles?
$200 Answer from Grams<-->
Moles
11.11g Al2O3
$300 Grams<--> Moles
What mass of Fe2O
if you are have 2.5
moles of Fe2O?
$300 Answer from Grams<-->
Moles
319.25 g Fe2O
$400 Grams<--> Moles
275 grams of sodium
hydroxide is equal to
many moles?
$400 Answer from Grams<-->
Moles
6.88 mol
NaOH
$500 Grams<--> Moles
C4H10 burns in oxygen, the
products are carbon dioxide
and water. What is the
mass of C4H10 when given
4.42 moles?
$500 Answer from Grams<-->
Moles
256.98g
C4H10
$100 to Molecules
How many atoms are
in 3,250 g Pb?
$100 Answer from to Molecules
24
9.44x10
atoms Pb
$200 Question from to Molecules
How many moles are
23
in 3.011 x 10 atoms
Mg?
$200 Answer from to Molecules
0.50 moles
$300 Question from to Molecules
How many molecules
are there in 7.02 g
SiO2?
$300 Answer from to Molecules
7.03 x 10
22
molecules
$400 Question from to Molecules
What is the mass in
23
grams of 3.011 x 10
atoms F?
$400 Answer from to Molecules
9.50 g Fe
$500 Question from to Molecules
How many molecules
is 320.0 grams of
C5H12?
$500 Answer from to Molecules
2.67 x 10 24
molecules
C5H12
$100 Question from % Yield
Calculate the theoretical yield of Calcium
Oxide if 24.8 grams of Calcium
Carbonate decomposes. Calculate the
percent yield if you got 13.1 grams in the
laboratory.
CaCO3
→
CaO
+
CO2
$100 Answer from % Yield
94%
$200 Question from % Yield
What is the percent yield if you experimentally
produce 3.65 grams of copper when 1.87
grams of Aluminum reacts with 9.65 grams of
Copper (II) Sulfate?
Al
+
CuSO4
→
Cu
+ Al2(SO4)3
$200 Answer from % Yield
95%
$300 Question from % Yield
There are 100.0 grams of each reactant
available. Determine the limiting reactant in
this equation.
SO2
+
2NaOH
→
Na2SO3
+
H2O
$300 Answer from % Yield
LR=NaOH
$400 Question from % Yield
Find the theoretical yield of silicon
carbide if 50.0 grams of silicon
dioxide reacts with 79.1 grams of
Carbon.
SiO2
+
C
→
SiC
+
CO
$400 Answer from % Yield
33.3g SiC
$500 Question from % Yield
What is the percent yield if 155 grams of
calcium carbonate is treated with 250
grams of hydrochloric acid and 142 grams
of calcium chloride is actually obtained?
CaCO3 + HCl → CaCl2 + CO2 + H2O
$500 Answer from % Yield
56.6%
$100 Question from Limiting
Reactants
If 10.4 moles of hydrogen, H2, and
9.1 moles of oxygen, O2, react. How
many moles of water, H2O, would be
produced by the reaction?
2 H2 + O2  2 H2O
$100 Answer from Limiting
Reactants
10.4 mol H2O
$200 Question from Limiting
Reactants
If 83.7 grams of aluminum, Al, and
195.2 grams of sulfur, S, are put into a
container and allowed to react
according to the above equation, which
substance(s) and how many grams of
each would be present in the container
after the reaction is complete?
2 Al + 3 S  Al2S3
$200 Answer from Limiting
Reactants
LR= Al
$300 Question from Limiting
reacatants
If 609.5 grams of vanadium (II) oxide,
VO, and 832 grams of iron (III) oxide, Fe2O3,
are put into a container and allowed to react
according to the equation above, which
substance(s) and how many grams of FeO
would be present in the container after the
reaction is complete?
2 VO + 3 Fe2O3  6 FeO + V2O5
$300 Answer from Limiting
Reactants
748.6g FeO
$400 Question from Limiting
Reactants
CO(g) + 2 H2(g)  CH3OH(l)
A mixture of 1.20 g H2 and 7.45g
CO are allowed to react.
Which reagent is the limiting
reagent?
$400 Answer from Limiting
Reactants
CO
$500 Question from Limiting
Reactants
A welder has 20.0 moles of
acetylene gas (C2H2) and 10.0
moles of oxygen gas (O2). They
combine to form water and carbon
dioxide.
How many moles of carbon dioxide
gas (CO2) will form?
$500 Answer from Limiting
Reactants
O2 yields 8.0 mol CO2
$100 Question from “Stoiched”
About Chemistry
0.300 moles of bromine gas (Br2)
and 0.500 moles of chlorine gas (Cl2)
react to form tribromine
monochloride (Br3Cl). How many
moles of this product will form?
$100 Answer from “Stoiched”
About Chemistry
0.2 mol
Br3Cl
$200 Question from “Stoiched”
About Chemistry
Determine the % yield when
7.80 grams of benzene (C6H6)
burns in oxygen gas to form
3.00 grams of CO2 gas and
water vapor.
$200 Answer from “Stoiched”
About Chemistry
11.5%
$300 Question from “Stoiched”
About Chemistry
25.3 g of magnesium reacts with
44.3 g of copper (II) nitrate to form
copper and magnesium nitrate.
What mass of copper will form?
$300 Answer from “Stoiched”
About Chemistry
16.Og Cu will form
$400 Question from “Stoiched”
About Chemistry
2 NH3 + 2 O2  N2O + 3 H2O
If 80.0 grams of O2 are reacted in the
above reaction, how many grams of
N2O will be produced?
$400 Answer from “Stoiched”
About Chemistry
55.2g
N2O
$500 Question from “Stoiched”
About Chemistry
CO (g) + 2 H2 (g)  CH3OH (l)
A mixture of 1.20 g H2 and 7.45 g CO
are allowed to react.
Suppose the actual yield is 7.52 g of
CH3OH. What is the % yield?
$500 Answer from “Stoiched”
About Chemistry
88.26 %
Final Jeopardy Question
Silicon nitride (Si3N4), a ceramic, is made by
the direct combination of silicon and
nitrogen at high temperature. How much
silicon must react with excess nitrogen to
prepare 125 grams of silicon nitride?
Final Jeopardy Answer
75.07g Si