Honors Chemistry - Reaction Stoichiometry
Practice Test
Mr. Matthew Totaro
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) How many eggs are needed to make 1 dozen waffles, assuming you have enough of all other ingredients?
Given: 2 cups flour + 3 eggs + 1 tbs oil
4 waffles
A) 48
B) 9
C) 12
D) 16
E) not enough information
2) How many moles of water are made from the reaction of 1.4 moles of hydrogen gas?
Given the reaction: 2H2 + O2 2H2 O
A)
B)
C)
D)
E)
2.8
0.7
1.4
2.1
not enough information
3) How many moles of sodium metal are needed to make 3.6 moles of sodium chloride?
Given the reaction: 2Na + Cl2
2NaCl
A) 0.9
B) 7.2
C) 1.8
D) 3.6
E) not enough information
4) How many grams of water are made from the reaction of 16.0 grams of oxygen gas?
Given the reaction: 2H2 + O2 2H2O
A) 18
B) 9
C) 36
D) 16
E) not enough information
5) How many grams of sodium metal are needed to make 29.3 grams of sodium chloride?
Given the reaction: 2Na + Cl2
2NaCl
A) 46.0
B) 5.75
C) 23.0
D) 11.5
E) not enough information
1
4 NO + 6 H2O, if 3.00 mol NH3 were made to react with excess of oxygen gas, the
6) Given that 4 NH3 + 5 O2
amount of H2O formed would be,
A) 2.00 mol
B) 3.00 mol
C) 4.50 mol
D) 6.00 mol
E) none of the above
7) Which ingredient is the limiting reactant if you have 6 cups of flour, 9 eggs and 2 tbs of oil?
Given: 2 cups flour + 3 eggs + 1 tbs oil
4 waffles
flour
A)
B) eggs
C) oil
D) waffles
E) not enough information
8) What is the theoretical yield of waffles if you have 5 cups of flour, 9 eggs and 3 tbs of oil?
Given: 2 cups flour + 3 eggs + 1 tbs oil
4 waffles
A) 10
B) 12
C) 8
D) 4
E) not enough information
9) How many grams of calcium phosphate are theoretically produced if we start with 3.40 moles of Ca(NO3)2 and
2.40 moles of Li3PO4?
Reaction: 3Ca(NO3)2 + 2Li3PO4 6LiNO3 + Ca3(PO4)2
A)
B)
C)
D)
E)
310
248
1054
351
not enough information
10) How many grams of NO2 are theoretically produced if we start with 1.20 moles of S and 9.90 moles of HNO3 ?
Reaction: S + 6HNO3
H2 SO4 + 6NO2 + 2H2 O
A)
B)
C)
D)
E)
7.20
331
455
786
not enough information
11) How many grams of water are theoretically produced for the following reaction given we have 2.6 moles of HCl
and 1.4 moles of Ca(OH)2?
Reaction: 2HCl + Ca(OH)2 2H2O + CaCl2
A)
B)
C)
D)
E)
25.2
50.4
46.8
103.6
not enough information
2
12) What is the limiting reactant for the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2?
Reaction: 4Al + 3O2
2Al2O3
A) Al
B) O2
C) Al2O3
D) both Al and O2
E) not enough information
13) Which is the limiting reactant in the following reaction given that you start with 15.5 g of Na2S and 12.1 g
CuSO4?
Reaction: Na2S + CuSO4 Na2SO4 + CuS
A)
B)
C)
D)
E)
Na2S
CuSO4
Na2SO4
CuS
not enough information
14) Which is the limiting reactant in the following reaction given that you start with 42.0 g of CO2 and 99.9 g KOH?
Reaction: CO2 + 2KOH
K2 CO3 + H2 O
A) K2 CO3
B) H2 O
C) CO2
D) KOH
E) not enough information
TRUE/FALSE. Mark 'A' if the statement is true and 'B' if the statement is false.
15) Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries
You can make 1 dozen muffins from 3 eggs.
4 muffins.
16) Given the reaction: 2 Na(s) + Cl2 (g) 2 NaCl(s)
The conversion factor for chlorine gas to sodium chloride is: 1 mol Cl2
2 mol NaCl
2 CaO,
17) Given the chemical equation: 2 Ca + O2
if 2 moles of CaO are formed in this reaction, then 2 moles of O2 must have reacted.
18) The limiting reactant is the reactant that produces the maximum amount of product.
19) The limiting reactant is the product that is completely consumed in a chemical reaction.
20) Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries 4 muffins
If you have 9 cups of flour, 4 eggs and plenty of blueberries, the theoretical yield of muffins is 16.
3
Answer Key
Testname: HONORS CHEMISTRY - REACTION STOICHIOMETRY PRACTICE EXAM
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
B
C
D
A
D
C
C
A
D
B
C
A
B
D
TRUE
TRUE
FALSE
FALSE
FALSE
TRUE
4