CHEM 1301 SUMMER 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.
Balance this equation using the smallest possible integers, NO + NH3 → N2 + H2O. What is the coefficient of the water?
(A)
1
4.
What is the mass of 4.50 x 1022 atoms of magnesium, Mg?
(A)
0.0748 g
5.
What is the molar mass of tetraphosphorus pentoxide?
(A)
100 g/mol
(B)
(B)
(B)
(B)
2
2
0.182 g
142 g/mol
(C)
(C)
(C)
(C)
4
(D)
6
(E)
10
3
(D)
6
(E)
12
0.897 g
(D)
1.82 g
(E)
18.2 g
173 g/mol
(D)
204 g/mol
(E)
220 g/mol
1
6.
Calculate the number of moles in 55.0 g of magnesium hydroxide.
(A)
(D)
0.943 mol
2.89 mol
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 12.0 g of O2 gas?
(A)
(D)
1.13 x 1023 molecules
2.26 x 1024 molecules
8.
Iron metal reacts with bromine as follows: Fe(s) + Br2(g) → FeBr3(s) How many moles of FeBr3 are obtained when 4.6 mol of Br2
reacts with excess Fe?
(A)
2.30 mol
9.
32.0 grams of the element oxygen:
(A)
(B)
(C)
(D)
(E)
contain 6.02 x 1023 atoms of oxygen
contain 1.204 x 1024 molecules of oxygen
contain the same number of oxygen atoms as 18.0 g of water
contain the same number of oxygen atoms as 36.0 g of water
contain the same number of oxygen atoms as 72.0 g of water
10.
Calculate the number of nitrogen atoms in 240. g of ammonium nitrate.
(A)
(C)
(E)
2.01 x 1023 nitrogen atoms
1.20 x 1024 nitrogen atoms
3.61 x 1024 nitrogen atoms
11.
How many moles of H3PO4 are produced when 36.5 g of HCl are produced by the reaction PCl5 + H2O → H3PO4 + HCl?
(A)
(D)
0.2 mol H3PO4
2 mol H3PO4
(B)
(E)
(B)
(E)
(B)
3.07 mol
1.33 mol
5.68 x 1023 mol
(C)
2.26 x 1023 molecules
4.52 x 1024 molecules
(C)
4.60 mol
(B)
(D)
(B)
(E)
(C)
0.5 mol H3PO4
5 mol H3PO4
(D)
4.52 x 1023 molecules
6.90 mol
(E)
9.2 mol
6.02 x 1023 nitrogen atoms
1.81 x 1024 nitrogen atoms
(C)
2
1.83 mol
1 mol H3PO4
12.
6.02 x 1021 molecules of an unknown substance X has a mass of 11.0 grams. What is the molar mass of X in g/mole?
(A)
(C)
(E)
110 g/mol
1100 g/mol
cannot be determined without the formula of X
13.
What is the molarity of formaldehyde in a solution containing 0.300 g of formaldehyde (CH2O) per mL?
(A)
0.0000100 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 FeCl2 is needed to prepare 750.0 mL of 2.00 M solution?
(A)
47.6 g
17.
A 0.250 M solution of sulfuric acid (H2SO4) is to be reacted with a solution of sodium hydroxide via a double-displacement reaction
to make sodium sulfate and water. 50.0 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity
of the NaOH solution?
(A)
0.0625 M
(B)
(B)
(B)
(B)
(B)
0.0100 M
29.0 g
123 g
95.3 g
0.125 M
(B)
(D)
(C)
(C)
(C)
(C)
(C)
220 g/mol
2200 g/mol
0.100 M
16.2 g
37.7 g
127 g
0.250 M
3
(D)
(D)
1.00 M
7.31 g
(E)
(E)
10.0 M
138 g
(D)
9.41 g
(E)
265 g
(D)
190.5 g
(E)
190,500 g
(D)
0.500 M
(E)
1.00 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
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.
Consider the reaction of hydrogen gas (H2) and nitrogen gas (N2) to make ammonia (NH3). How many moles of ammonia will be
made when 3 moles of hydrogen gas react with 3 moles of nitrogen gas?
(A)
2
(B)
3
(B)
(E)
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
(C)
5
(C)
(D)
4
H2 + O2 → 2 H2O
6
(E)
8
CHEM 1301 SUMMER 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.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
2.
What is the mass of 4.50 x 1022 atoms of magnesium, Mg?
(A)
0.0748 g
3.
Calculate the number of moles in 55.0 g of magnesium hydroxide.
(A)
(D)
0.943 mol
2.89 mol
4.
Iron metal reacts with bromine as follows: Fe(s) + Br2(g) → FeBr3(s) How many moles of FeBr3 are obtained when 4.6 mol of Br2
reacts with excess Fe?
(A)
2.30 mol
5.
Calculate the number of nitrogen atoms in 240. g of ammonium nitrate.
(A)
(C)
(E)
2.01 x 1023 nitrogen atoms
1.20 x 1024 nitrogen atoms
3.61 x 1024 nitrogen atoms
(B)
(B)
2
(C)
0.182 g
(C)
(B)
(E)
(B)
3.07 mol
4
(D)
6
(E)
10
0.897 g
(D)
1.82 g
(E)
18.2 g
(C)
1.83 mol
1.33 mol
5.68 x 1023 mol
(C)
4.60 mol
(B)
(D)
1
(D)
6.90 mol
6.02 x 1023 nitrogen atoms
1.81 x 1024 nitrogen atoms
(E)
9.2 mol
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, NO + NH3 → N2 + H2O. What is the coefficient of the water?
(A)
1
8.
What is the molar mass of tetraphosphorus pentoxide?
(A)
100 g/mol
9.
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 12.0 g of O2 gas?
(A)
(D)
1.13 x 1023 molecules
2.26 x 1024 molecules
10.
32.0 grams of the element oxygen:
(A)
(B)
(C)
(D)
(E)
contain 6.02 x 1023 atoms of oxygen
contain 1.204 x 1024 molecules of oxygen
contain the same number of oxygen atoms as 18.0 g of water
contain the same number of oxygen atoms as 36.0 g of water
contain the same number of oxygen atoms as 72.0 g of water
(B)
(B)
2
(C)
142 g/mol
(B)
(E)
(C)
3
(D)
6
(E)
12
173 g/mol
(D)
204 g/mol
(E)
220 g/mol
2.26 x 1023 molecules
4.52 x 1024 molecules
2
(C)
4.52 x 1023 molecules
11.
6.02 x 1021 molecules of an unknown substance X has a mass of 11.0 grams. What is the molar mass of X in g/mole?
(A)
(C)
(E)
110 g/mol
1100 g/mol
cannot be determined without the formula of X
12.
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
13.
What mass of FeCl2 is needed to prepare 750.0 mL of 2.00 M solution?
(A)
47.6 g
14.
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
15.
Consider the reaction of hydrogen gas (H2) and nitrogen gas (N2) to make ammonia (NH3). How many moles of ammonia will be
made when 3 moles of hydrogen gas react with 3 moles of nitrogen gas?
(A)
2
16.
How many moles of H3PO4 are produced when 36.5 g of HCl are produced by the reaction PCl5 + H2O → H3PO4 + HCl?
(A)
(D)
0.2 mol H3PO4
2 mol H3PO4
17.
What is the molarity of formaldehyde in a solution containing 0.300 g of formaldehyde (CH2O) per mL?
(A)
0.0000100 M
(B)
(B)
(B)
29.0 g
(C)
95.3 g
(C)
(B)
(E)
3
0.0100 M
220 g/mol
2200 g/mol
16.2 g
127 g
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
(C)
(B)
(E)
(B)
(B)
(D)
5
7.31 g
(E)
138 g
(D)
190.5 g
(E)
190,500 g
(C)
(D)
0.5 mol H3PO4
5 mol H3PO4
(C)
(D)
(C)
0.100 M
3
(D)
H2 + O2 → 2 H2O
6
(E)
8
1 mol H3PO4
1.00 M
(E)
10.0 M
18.
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
19.
A 0.250 M solution of sulfuric acid (H2SO4) is to be reacted with a solution of sodium hydroxide via a double-displacement reaction
to make sodium sulfate and water. 50.0 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity
of the NaOH solution?
(A)
0.0625 M
20.
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)
123 g
0.125 M
(C)
(C)
37.7 g
0.250 M
4
(D)
(D)
9.41 g
0.500 M
(E)
(E)
265 g
1.00 M
CHEM 1301 SUMMER 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.
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, NO + NH3 → N2 + H2O. What is the coefficient of the water?
(A)
1
3.
What is the molar mass of tetraphosphorus pentoxide?
(A)
100 g/mol
4.
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 12.0 g of O2 gas?
(A)
(D)
1.13 x 1023 molecules
2.26 x 1024 molecules
(B)
(B)
2
(C)
142 g/mol
(B)
(E)
(C)
3
(D)
6
(E)
12
173 g/mol
(D)
204 g/mol
(E)
220 g/mol
2.26 x 1023 molecules
4.52 x 1024 molecules
1
(C)
4.52 x 1023 molecules
5.
32.0 grams of the element oxygen:
(A)
(B)
(C)
(D)
(E)
contain 6.02 x 1023 atoms of oxygen
contain 1.204 x 1024 molecules of oxygen
contain the same number of oxygen atoms as 18.0 g of water
contain the same number of oxygen atoms as 36.0 g of water
contain the same number of oxygen atoms as 72.0 g of water
6.
Balance this equation using the smallest possible integers, S + HNO3 → H2SO4 + NO2 + H2O. What is the coefficient of the water?
(A)
1
7.
What is the mass of 4.50 x 1022 atoms of magnesium, Mg?
(A)
0.0748 g
8.
Calculate the number of moles in 55.0 g of magnesium hydroxide.
(A)
(D)
0.943 mol
2.89 mol
9.
Iron metal reacts with bromine as follows: Fe(s) + Br2(g) → FeBr3(s) How many moles of FeBr3 are obtained when 4.6 mol of Br2
reacts with excess Fe?
(A)
2.30 mol
10.
Calculate the number of nitrogen atoms in 240. g of ammonium nitrate.
(A)
(C)
(E)
2.01 x 1023 nitrogen atoms
1.20 x 1024 nitrogen atoms
3.61 x 1024 nitrogen atoms
(B)
(B)
2
(C)
0.182 g
(C)
(B)
(E)
(B)
3.07 mol
4
(D)
6
(E)
10
0.897 g
(D)
1.82 g
(E)
18.2 g
(C)
1.83 mol
1.33 mol
5.68 x 1023 mol
(C)
4.60 mol
(B)
(D)
2
(D)
6.90 mol
6.02 x 1023 nitrogen atoms
1.81 x 1024 nitrogen atoms
(E)
9.2 mol
11.
How many moles of H3PO4 are produced when 36.5 g of HCl are produced by the reaction PCl5 + H2O → H3PO4 + HCl?
(A)
(D)
0.2 mol H3PO4
2 mol H3PO4
12.
What is the molarity of formaldehyde in a solution containing 0.300 g of formaldehyde (CH2O) per mL?
(A)
0.0000100 M
13.
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
14.
A 0.250 M solution of sulfuric acid (H2SO4) is to be reacted with a solution of sodium hydroxide via a double-displacement reaction
to make sodium sulfate and water. 50.0 mL of the H2SO4 solution reacts with 25.0 mL of the NaOH solution. What is the molarity
of the NaOH solution?
(A)
0.0625 M
15.
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
16.
6.02 x 1021 molecules of an unknown substance X has a mass of 11.0 grams. What is the molar mass of X in g/mole?
(A)
(C)
(E)
110 g/mol
1100 g/mol
cannot be determined without the formula of X
(B)
(E)
(B)
(B)
(B)
0.5 mol H3PO4
5 mol H3PO4
0.0100 M
123 g
0.125 M
(C)
(C)
(C)
(C)
0.100 M
37.7 g
(D)
0.250 M
(B)
(D)
3
(D)
220 g/mol
2200 g/mol
(D)
1 mol H3PO4
1.00 M
9.41 g
0.500 M
(E)
(E)
(E)
10.0 M
265 g
1.00 M
17.
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
18.
What mass of FeCl2 is needed to prepare 750.0 mL of 2.00 M solution?
(A)
47.6 g
19.
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
20.
Consider the reaction of hydrogen gas (H2) and nitrogen gas (N2) to make ammonia (NH3). How many moles of ammonia will be
made when 3 moles of hydrogen gas react with 3 moles of nitrogen gas?
(A)
2
(B)
(B)
(B)
29.0 g
(C)
95.3 g
3
(C)
(B)
(E)
16.2 g
127 g
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
(C)
5
(D)
7.31 g
(E)
138 g
(D)
190.5 g
(E)
190,500 g
(C)
(D)
4
H2 + O2 → 2 H2O
6
(E)
8