CHEM 1301 SPRING 2003
TEST 3 VERSION 1
NO CHEATING!
BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!]
1.
Consider the reaction between aluminum sulfate and barium chloride shown. Which of the statements is FALSE?
Al2(SO4)3 + 3 BaCl2 → 3 BaSO4 + 2 AlCl3
(A)
(B)
(C)
(D)
(E)
this is a metathesis reaction
aluminum chloride is a product of the reaction
6 "molecules" of barium chloride will make 6 "molecules" of barium sulfate
there will be 3/2 times as many aluminum chloride molecules made as there are molecules of barium chloride used.
the fact that the number of each type of atom on each side is equal is related to the Law of Conservation of Mass.
2.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
3.
What is the sum of the coefficients when the following is balanced:
(A)
2
4.
What is the mass of 2.10 x 1021 atoms of copper, Cu?
(A)
0.00349 g
5.
What is the molar mass of aspirin, C9H8O4?
(A)
(D)
29.02 g/mol
244.17 g/mol
(B)
(B)
(B)
2
(C)
6
(C)
0.101 g
(B)
(E)
(C)
4
(D)
6
(E)
10
K2O + H2O → KOH
3
(D)
8
(E)
4
0.222 g
(D)
63.5 g
(E)
831 g
(C)
180.17 g/mol
116.08 g/mol
252.25 g/mol
1
6.
Calculate the number of moles in 35.6 g of magnesium hydroxide.
(A)
6.56
7.
Consider the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water. How many molecules of water will be made by the
reaction of 48.0 g of O2 gas?
(A)
3.01 x 1023
8.
Iron metal reacts with chlorine gas as follows: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of FeCl3 are obtained when 4.6
mol of Cl2 reacts with excess Fe?
(A)
3.1 mol
9.
31.0 grams of the element phosphorus:
(A)
(C)
(E)
contain 6.02 x 1023 P4 molecules
contain 6.02 x 1023 P atoms
contain 31.0 moles of P
10.
Calculate the number of oxygen atoms in 146.7 g of sodium sulfate, Na2SO4.
(A)
6.22 × 1023
11.
How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction PCl5 + 4 H2O → H3PO4 + 5 HCl?
(A)
0.548
12.
3.01 x 1022 molecules of an unknown substance X has a mass of 24.0 grams. What is the molar mass of X in g/mole?
(A)
24
(B)
(B)
(B)
(B)
(B)
(B)
4.64
9.05 x 1023
4.6 mol
1.46 × 1025
0.113
48
(C)
(C)
(C)
1.220
1.81 x 1024
1.5 mol
(B)
(D)
(C)
(C)
(C)
(D)
180
2
(D)
3.61 x 1024
2.3 mol
(E)
(E)
0.882
1.81 x 1025
(E)
6.2 mol
(E)
3.10 × 1024
contain 31.0 x (6.02 x 1023) P atoms
contain 31.0 P atoms
2.49 × 1024
0.110
(D)
0.610
(D)
(D)
(D)
5.83 × 1026
0.204
240
(E)
(E)
0.041
480
13.
What is the molarity of formaldehyde in a solution containing 0.25 g of formaldehyde (CH2O) per mL?
(A)
2.5 M
14.
Barium hydroxide (used in corrosion inhibitors and lubricants) reacts with chloric acid (HClO3) to form barium chlorate [Ba(ClO3)2]
and water. What mass of water is formed when 138 g of barium hydroxide reacts with chloric acid?
(A)
32.5 g
15.
Lead(II) sulfide (PbS) was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2) to form lead(II) sulfate
and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
(A)
151 g
16.
What mass of CuBr2 is needed to prepare 750.0 mL of 1.25 M solution?
(A)
134 g
17.
A 0.15 M solution of sulfuric acid is to be reacted with a solution of sodium hydroxide via a double-displacement reaction to make
sodium sulfate and water. 33.3 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity of the
NaOH solution?
(A)
0.40 M
18.
You know five categories of reactions. Which of the following could be described by more than one of these categories?
(A)
(D)
H2 + Cl2 → 2 HCl
2 Na + 2 H2O → H2 + 2 NaOH
(B)
(B)
(B)
(B)
(B)
25 M
(C)
29.0 g
(C)
123 g
(C)
209 g
(C)
0.11 M
(C)
(B)
(E)
8.3 M
16.2 g
37.7 g
372 g
0.15 M
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
3
(D)
(D)
83 M
7.31 g
(E)
(E)
4.0 M
138 g
(D)
9.41 g
(E)
265 g
(D)
938 g
(E)
223.5 g
(D)
(C)
0.20 M
H2 + O2 → 2 H2O
(E)
0.22 M
19.
Which of the following is NOT an example of a solution?
(A)
(B)
(C)
(D)
(E)
bronze
the atmosphere
sterling silver
Gatorade
all of these are examples of solutions
20.
Which of the following reactions will produce a precipitate (solid product)?
(A)
(B)
(C)
(D)
(E)
NaCl(aq) + KNO3(aq)
KCl(aq) + NaNO3(aq)
NaCl(aq) + AgNO3(aq)
KCl(aq) + NaCH3COO(aq)
CaCl2(aq) + NaBr(aq)
4
CHEM 1301 SPRING 2003
TEST 3 VERSION 2
NO CHEATING!
BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!]
1.
Calculate the number of moles in 35.6 g of magnesium hydroxide.
(A)
6.56
2.
Consider the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water. How many molecules of water will be made by the
reaction of 48.0 g of O2 gas?
(A)
3.01 x 1023
3.
Iron metal reacts with chlorine gas as follows: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of FeCl3 are obtained when 4.6
mol of Cl2 reacts with excess Fe?
(A)
3.1 mol
4.
31.0 grams of the element phosphorus:
(A)
(C)
(E)
contain 6.02 x 1023 P4 molecules
contain 6.02 x 1023 P atoms
contain 31.0 moles of P
5.
Calculate the number of oxygen atoms in 146.7 g of sodium sulfate, Na2SO4.
(A)
6.22 × 1023
(B)
(B)
(B)
(B)
4.64
9.05 x 1023
4.6 mol
1.46 × 1025
(C)
(C)
(C)
1.220
1.81 x 1024
1.5 mol
(B)
(D)
(C)
(D)
(D)
3.61 x 1024
2.3 mol
(E)
(E)
0.882
1.81 x 1025
(E)
6.2 mol
(E)
3.10 × 1024
contain 31.0 x (6.02 x 1023) P atoms
contain 31.0 P atoms
2.49 × 1024
1
(D)
0.610
(D)
5.83 × 1026
6.
Consider the reaction between aluminum sulfate and barium chloride shown. Which of the statements is FALSE?
Al2(SO4)3 + 3 BaCl2 → 3 BaSO4 + 2 AlCl3
(A)
(B)
(C)
(D)
(E)
this is a metathesis reaction
aluminum chloride is a product of the reaction
6 "molecules" of barium chloride will make 6 "molecules" of barium sulfate
there will be 3/2 times as many aluminum chloride molecules made as there are molecules of barium chloride used.
the fact that the number of each type of atom on each side is equal is related to the Law of Conservation of Mass.
7.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
8.
What is the sum of the coefficients when the following is balanced:
(A)
2
9.
What is the mass of 2.10 x 1021 atoms of copper, Cu?
(A)
0.00349 g
10.
What is the molar mass of aspirin, C9H8O4?
(A)
(D)
29.02 g/mol
244.17 g/mol
11.
What mass of CuBr2 is needed to prepare 750.0 mL of 1.25 M solution?
(A)
134 g
(B)
(B)
(B)
2
(C)
6
(C)
0.101 g
(B)
(E)
(B)
209 g
(C)
4
(D)
(E)
10
K2O + H2O → KOH
3
(D)
8
(E)
4
0.222 g
(D)
63.5 g
(E)
831 g
(C)
180.17 g/mol
(D)
938 g
(E)
223.5 g
116.08 g/mol
252.25 g/mol
(C)
6
372 g
2
12.
A 0.15 M solution of sulfuric acid is to be reacted with a solution of sodium hydroxide via a double-displacement reaction to make
sodium sulfate and water. 33.3 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity of the
NaOH solution?
(A)
0.40 M
13.
You know five categories of reactions. Which of the following could be described by more than one of these categories?
(A)
(D)
H2 + Cl2 → 2 HCl
2 Na + 2 H2O → H2 + 2 NaOH
14.
Which of the following is NOT an example of a solution?
(A)
(B)
(C)
(D)
(E)
bronze
the atmosphere
sterling silver
Gatorade
all of these are examples of solutions
15.
Which of the following reactions will produce a precipitate (solid product)?
(A)
(B)
(C)
(D)
(E)
NaCl(aq) + KNO3(aq)
KCl(aq) + NaNO3(aq)
NaCl(aq) + AgNO3(aq)
KCl(aq) + NaCH3COO(aq)
CaCl2(aq) + NaBr(aq)
16.
How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction PCl5 + 4 H2O → H3PO4 + 5 HCl?
(A)
0.548
(B)
(B)
0.11 M
0.113
(C)
(B)
(E)
0.15 M
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
(C)
0.110
3
(D)
(C)
(D)
0.20 M
(E)
0.22 M
H2 + O2 → 2 H2O
0.204
(E)
0.041
17.
3.01 x 1022 molecules of an unknown substance X has a mass of 24.0 grams. What is the molar mass of X in g/mole?
(A)
24
18.
What is the molarity of formaldehyde in a solution containing 0.25 g of formaldehyde (CH2O) per mL?
(A)
2.5 M
19.
Barium hydroxide (used in corrosion inhibitors and lubricants) reacts with chloric acid (HClO3) to form barium chlorate [Ba(ClO3)2]
and water. What mass of water is formed when 138 g of barium hydroxide reacts with chloric acid?
(A)
32.5 g
20.
Lead(II) sulfide (PbS) was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2) to form lead(II) sulfate
and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
(A)
151 g
(B)
(B)
(B)
(B)
48
25 M
29.0 g
123 g
(C)
(C)
(C)
(C)
180
8.3 M
16.2 g
37.7 g
4
(D)
(D)
(D)
(D)
240
83 M
7.31 g
9.41 g
(E)
480
(E)
4.0 M
(E)
(E)
138 g
265 g
CHEM 1301 SPRING 2003
TEST 3 VERSION 3
NO CHEATING!
BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!]
1.
How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction PCl5 + 4 H2O → H3PO4 + 5 HCl?
(A)
0.548
2.
3.01 x 1022 molecules of an unknown substance X has a mass of 24.0 grams. What is the molar mass of X in g/mole?
(A)
24
3.
What is the molarity of formaldehyde in a solution containing 0.25 g of formaldehyde (CH2O) per mL?
(A)
2.5 M
4.
Barium hydroxide (used in corrosion inhibitors and lubricants) reacts with chloric acid (HClO3) to form barium chlorate [Ba(ClO3)2]
and water. What mass of water is formed when 138 g of barium hydroxide reacts with chloric acid?
(A)
32.5 g
5.
Lead(II) sulfide (PbS) was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2) to form lead(II) sulfate
and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
(A)
151 g
6.
What mass of CuBr2 is needed to prepare 750.0 mL of 1.25 M solution?
(A)
134 g
(B)
(B)
(B)
(B)
(B)
(B)
0.113
48
25 M
29.0 g
123 g
209 g
(C)
(C)
(C)
(C)
(C)
(C)
0.110
180
8.3 M
16.2 g
37.7 g
372 g
1
(D)
(D)
(D)
(D)
0.204
240
83 M
7.31 g
(E)
0.041
(E)
480
(E)
4.0 M
(E)
138 g
(D)
9.41 g
(E)
265 g
(D)
938 g
(E)
223.5 g
7.
A 0.15 M solution of sulfuric acid is to be reacted with a solution of sodium hydroxide via a double-displacement reaction to make
sodium sulfate and water. 33.3 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity of the
NaOH solution?
(A)
0.40 M
8.
You know five categories of reactions. Which of the following could be described by more than one of these categories?
(A)
(D)
H2 + Cl2 → 2 HCl
2 Na + 2 H2O → H2 + 2 NaOH
9.
Which of the following is NOT an example of a solution?
(A)
(B)
(C)
(D)
(E)
bronze
the atmosphere
sterling silver
Gatorade
all of these are examples of solutions
10.
Which of the following reactions will produce a precipitate (solid product)?
(A)
(B)
(C)
(D)
(E)
NaCl(aq) + KNO3(aq)
KCl(aq) + NaNO3(aq)
NaCl(aq) + AgNO3(aq)
KCl(aq) + NaCH3COO(aq)
CaCl2(aq) + NaBr(aq)
(B)
0.11 M
(C)
(B)
(E)
0.15 M
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
2
(D)
(C)
0.20 M
H2 + O2 → 2 H2O
(E)
0.22 M
11.
Consider the reaction between aluminum sulfate and barium chloride shown. Which of the statements is FALSE?
Al2(SO4)3 + 3 BaCl2 → 3 BaSO4 + 2 AlCl3
(A)
(B)
(C)
(D)
(E)
this is a metathesis reaction
aluminum chloride is a product of the reaction
6 "molecules" of barium chloride will make 6 "molecules" of barium sulfate
there will be 3/2 times as many aluminum chloride molecules made as there are molecules of barium chloride used.
the fact that the number of each type of atom on each side is equal is related to the Law of Conservation of Mass.
12.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
13.
What is the sum of the coefficients when the following is balanced:
(A)
2
14.
What is the mass of 2.10 x 1021 atoms of copper, Cu?
(A)
0.00349 g
15.
What is the molar mass of aspirin, C9H8O4?
(A)
(D)
29.02 g/mol
244.17 g/mol
16.
Calculate the number of moles in 35.6 g of magnesium hydroxide.
(A)
6.56
(B)
(B)
(B)
2
(C)
6
(C)
0.101 g
(B)
(E)
(B)
4.64
(C)
4
(D)
(E)
10
K2O + H2O → KOH
3
(D)
8
(E)
4
0.222 g
(D)
63.5 g
(E)
831 g
(C)
180.17 g/mol
(D)
0.610
(E)
0.882
116.08 g/mol
252.25 g/mol
(C)
6
1.220
3
17.
Consider the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water. How many molecules of water will be made by the
reaction of 48.0 g of O2 gas?
(A)
3.01 x 1023
18.
Iron metal reacts with chlorine gas as follows: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of FeCl3 are obtained when 4.6
mol of Cl2 reacts with excess Fe?
(A)
3.1 mol
19.
31.0 grams of the element phosphorus:
(A)
(C)
(E)
contain 6.02 x 1023 P4 molecules
contain 6.02 x 1023 P atoms
contain 31.0 moles of P
20.
Calculate the number of oxygen atoms in 146.7 g of sodium sulfate, Na2SO4.
(A)
6.22 × 1023
(B)
(B)
(B)
9.05 x 1023
4.6 mol
1.46 × 1025
(C)
(C)
1.81 x 1024
1.5 mol
(B)
(D)
(C)
(D)
3.61 x 1024
2.3 mol
(E)
1.81 x 1025
(E)
6.2 mol
(E)
3.10 × 1024
contain 31.0 x (6.02 x 1023) P atoms
contain 31.0 P atoms
2.49 × 1024
4
(D)
(D)
5.83 × 1026
CHEM 1301 SPRING 2003
TEST 3 VERSION 4
NO CHEATING!
BUBBLE IN “1” IN THE P COLUMN TO GET YOUR GRADE POSTED!!!!! [the only way you’ll find out how you did!]
1.
What mass of CuBr2 is needed to prepare 750.0 mL of 1.25 M solution?
(A)
134 g
2.
A 0.15 M solution of sulfuric acid is to be reacted with a solution of sodium hydroxide via a double-displacement reaction to make
sodium sulfate and water. 33.3 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity of the
NaOH solution?
(A)
0.40 M
3.
You know five categories of reactions. Which of the following could be described by more than one of these categories?
(A)
(D)
H2 + Cl2 → 2 HCl
2 Na + 2 H2O → H2 + 2 NaOH
4.
Which of the following is NOT an example of a solution?
(A)
(B)
(C)
(D)
(E)
bronze
the atmosphere
sterling silver
Gatorade
all of these are examples of solutions
(B)
(B)
209 g
(C)
0.11 M
(C)
(B)
(E)
372 g
0.15 M
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
1
(D)
(D)
(C)
938 g
0.20 M
H2 + O2 → 2 H2O
(E)
(E)
223.5 g
0.22 M
5.
Which of the following reactions will produce a precipitate (solid product)?
(A)
(B)
(C)
(D)
(E)
NaCl(aq) + KNO3(aq)
KCl(aq) + NaNO3(aq)
NaCl(aq) + AgNO3(aq)
KCl(aq) + NaCH3COO(aq)
CaCl2(aq) + NaBr(aq)
6.
How many moles of H3PO4 are produced when 20.0 g of HCl are produced by the reaction PCl5 + 4 H2O → H3PO4 + 5 HCl?
(A)
0.548
7.
3.01 x 1022 molecules of an unknown substance X has a mass of 24.0 grams. What is the molar mass of X in g/mole?
(A)
24
8.
What is the molarity of formaldehyde in a solution containing 0.25 g of formaldehyde (CH2O) per mL?
(A)
2.5 M
9.
Barium hydroxide (used in corrosion inhibitors and lubricants) reacts with chloric acid (HClO3) to form barium chlorate [Ba(ClO3)2]
and water. What mass of water is formed when 138 g of barium hydroxide reacts with chloric acid?
(A)
32.5 g
10.
Lead(II) sulfide (PbS) was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2) to form lead(II) sulfate
and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
(A)
151 g
(B)
(B)
(B)
(B)
(B)
0.113
48
25 M
29.0 g
123 g
(C)
(C)
(C)
(C)
(C)
0.110
180
8.3 M
16.2 g
37.7 g
2
(D)
(D)
(D)
(D)
(D)
0.204
240
83 M
7.31 g
9.41 g
(E)
0.041
(E)
480
(E)
4.0 M
(E)
(E)
138 g
265 g
11.
Calculate the number of moles in 35.6 g of magnesium hydroxide.
(A)
6.56
12.
Consider the reaction of hydrogen gas (H2) and oxygen gas (O2) to form water. How many molecules of water will be made by the
reaction of 48.0 g of O2 gas?
(A)
3.01 x 1023
13.
Iron metal reacts with chlorine gas as follows: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of FeCl3 are obtained when 4.6
mol of Cl2 reacts with excess Fe?
(A)
3.1 mol
14.
31.0 grams of the element phosphorus:
(A)
(C)
(E)
contain 6.02 x 1023 P4 molecules
contain 6.02 x 1023 P atoms
contain 31.0 moles of P
15.
Calculate the number of oxygen atoms in 146.7 g of sodium sulfate, Na2SO4.
(A)
6.22 × 1023
16.
Consider the reaction between aluminum sulfate and barium chloride shown. Which of the statements is FALSE?
(B)
(B)
(B)
(B)
4.64
9.05 x 1023
4.6 mol
1.46 × 1025
(C)
(C)
(C)
1.220
1.81 x 1024
1.5 mol
(B)
(D)
(C)
(D)
(D)
(D)
0.610
3.61 x 1024
2.3 mol
(E)
(E)
6.2 mol
(E)
3.10 × 1024
contain 31.0 x (6.02 x 1023) P atoms
contain 31.0 P atoms
2.49 × 1024
(D)
5.83 × 1026
this is a metathesis reaction
aluminum chloride is a product of the reaction
6 "molecules" of barium chloride will make 6 "molecules" of barium sulfate
there will be 3/2 times as many aluminum chloride molecules made as there are molecules of barium chloride used.
the fact that the number of each type of atom on each side is equal is related to the Law of Conservation of Mass.
3
1.81 x 1025
(E)
Al2(SO4)3 + 3 BaCl2 → 3 BaSO4 + 2 AlCl3
(A)
(B)
(C)
(D)
(E)
0.882
17.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
18.
What is the sum of the coefficients when the following is balanced:
(A)
2
19.
What is the mass of 2.10 x 1021 atoms of copper, Cu?
(A)
0.00349 g
20.
What is the molar mass of aspirin, C9H8O4?
(A)
(D)
29.02 g/mol
244.17 g/mol
(B)
(B)
(B)
2
(C)
6
(C)
0.101 g
(B)
(E)
(C)
4
(D)
6
(E)
10
K2O + H2O → KOH
3
(D)
8
(E)
4
0.222 g
(D)
63.5 g
(E)
831 g
(C)
180.17 g/mol
116.08 g/mol
252.25 g/mol
4