CHEMISTRY 1301
SUMMER 2005
TEST 3, Version 1
Answer questions on the attached scantron. Bubble in "1" under the "P" column if you want to know your grade
NO CHEATING!!!
1.
When the following equation is balanced, what is the coefficient of C: Ca3(PO4)2(s) + SiO2(s) + C(s) → CaSiO3(s) + CO + P4
(A)
1
2.
When the following equation is balanced using the smallest possible integral coefficients, what is the sum of all of the coefficients?
Cu + HNO3 → Cu(NO3)2 + NO2 + H2O
(A)
5
3.
Calcium fluoride is used to fluoridate drinking water. Calculate its molar mass in g/mol.
(A)
118.15
4.
What is the mass in grams of 0.50 mol of the common antacid calcium carbonate?
(A)
800 g
5.
Calculate the number of sodium atoms in 29.34 g of sodium sulfate, Na2SO4.
(A)
(D)
1.244 × 1023 Na atoms
2.915 × 1024 Na atoms
6.
Calculate the mass in grams of 1.67 × 1023 molecules of CBr4.
(A)
92.1 g
(B)
(B)
(B)
(B)
(B)
2
(C)
6
(C)
99.15
(C)
25.0 g
(C)
(B)
(E)
14.42 g
4
(D)
8
(D)
78.07
50.0 g
4.976 × 1023 Na atoms
1.166 × 1025 Na atoms
(C)
0.278 g
1
6
(E)
10
9
(E)
10
(D)
59.08
(E)
38.00
(D)
26.0 g
(E)
82.0 g
(C)
2.488 × 1023 Na atoms
(D)
0.0434 g
(E)
5.54 x 1025
7.
Which of the following samples contains the greatest number of moles of carbon atoms?
(A)
(B)
(C)
(D)
(E)
58 g of C4H10
46 g of C2H5OH
44 g of CO2
180 g of C6H12O6
all contain the same number of moles of carbon atoms
8.
Ammonia will react with fluorine to produce dinitrogen tetrafluoride and hydrogen fluoride (used in production of aluminum, in
uranium processing, and in frosting of light bulbs).
2NH3(g) + 5F2(g) → N2F4(g) + 6HF(g)
How many moles of NH3 are needed to react completely with 6.8 moles of F2?
(A)
17.0 mol
9.
The number of atoms in 9 g of aluminum is the same as the number of atoms in
(A)
(D)
8.1 g of magnesium.
24.3 g of magnesium.
10.
A reaction between Na2O and P4O10 forms Na3PO4. How many grams of Na3PO4 will be produced from the reaction of 0.400 mol
of Na2O with P4O10?
(A)
43.8 g
11.
When hydrogen and nitrogen react together, they produce ammonia, NH3. How many grams of nitrogen would be required to
produce 3.01 x 1024 molecules of ammonia?
(A)
3.01 x 1024
(B)
6.8 mol
(B)
(E)
(B)
(B)
65.6 g
140
(C)
3.40 mol
18.0 g of magnesium.
12.15 g of magnesium.
(C)
(C)
87.6 g
70
2
(D)
2.72 mo1
(C)
9.0 g of magnesium.
(D)
(D)
262 g
35
(E)
(E)
(E)
1.14 mol
24.8 g
14
12.
What type of reaction is 4 H2O + 3 Fe → Fe3O4 + 4 H2
(A)
(D)
Combination (synthesis)
Double displacement
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 + H2O → H2 + NaOH
14.
How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 97 g of sulfur
tetrafluoride?
3SCl2(l)
+
4NaF(s)
(B)
(E)
(B)
(E)
→ SF4(g)
(B)
(C)
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
S2Cl2(l)
+
4NaCl(s)
(C)
97 g
(C)
H2 + O2 → 2 H2O
302 g
15.
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 46 g of barium hydroxide reacts with chloric acid?
(A)
46 g
16.
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 26.5 g of lead(II) sulfide?
(A)
26.5 g
17.
A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts
as normal human blood Calculate the mass of solute needed to prepare 550.0 mL of a physiological saline solution.
(A)
82.6 g
(B)
(B)
10.8 g
15.1 g
63.8 g
(C)
(C)
(C)
9.7 g
12.3 g
32.2 g
3
(D)
Single displacement
(A)
(B)
151 g
+
Decomposition
Combustion
(D)
(D)
(D)
41 g
5.4 g
3.77 g
17.5 g
(E)
(E)
(E)
(E)
10.2 g
2.44 g
0.941 g
4.82 g
18.
When 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 125. mL of solution, the concentration of Na2CO3 is:
(A)
0.0208 M
19.
How many milliliters of 1.58 M HCl are needed to react completely with 46.4 g of NaHCO3
HCl(aq)
+
NaHCO3(s)
(B)
0.0492 M
→ NaCl(s)
(B)
+
1144 mL
(C)
H2O(l)
+
0.197 M
(D)
0.410 M
(E)
20.8 M
(E)
0.350 mL
CO2(g)
(A)
1276 mL
(C)
1072 mL
(D)
350 mL
20.
How many grams of H2 gas can be produced from the reaction of 1.00 mole Al, 1.00 mole NaOH and 4.00 moles of water?
2 Al(s) + 2 NaOH(aq) + 6 H2O(l) → 2 NaAl(OH)4 + 3 H2(g)
(A)
2.00 g
(B)
3.00 g
(C)
4.00 g
4
(E)
6.00 g
(E)
10.0 g
CHEMISTRY 1301
SUMMER 2005
TEST 3, Version 2
Answer questions on the attached scantron. Bubble in "1" under the "P" column if you want to know your grade
NO CHEATING!!!
1.
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 26.5 g of lead(II) sulfide?
(A)
26.5 g
2.
A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts
as normal human blood Calculate the mass of solute needed to prepare 550.0 mL of a physiological saline solution.
(A)
82.6 g
3.
When 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 125. mL of solution, the concentration of Na2CO3 is:
(A)
0.0208 M
4.
How many milliliters of 1.58 M HCl are needed to react completely with 46.4 g of NaHCO3
HCl(aq)
+
(B)
(B)
NaHCO3(s)
(B)
15.1 g
63.8 g
(C)
0.0492 M
→ NaCl(s)
(B)
(C)
+
1144 mL
(C)
H2O(l)
+
12.3 g
32.2 g
0.197 M
(D)
(D)
(D)
3.77 g
17.5 g
0.410 M
(E)
(E)
0.941 g
4.82 g
(E)
20.8 M
(E)
0.350 mL
CO2(g)
(A)
1276 mL
(C)
1072 mL
(D)
350 mL
5.
How many grams of H2 gas can be produced from the reaction of 1.00 mole Al, 1.00 mole NaOH and 4.00 moles of water?
2 Al(s) + 2 NaOH(aq) + 6 H2O(l) → 2 NaAl(OH)4 + 3 H2(g)
(A)
2.00 g
(B)
3.00 g
(C)
4.00 g
1
(E)
6.00 g
(E)
10.0 g
6.
When hydrogen and nitrogen react together, they produce ammonia, NH3. How many grams of nitrogen would be required to
produce 3.01 x 1024 molecules of ammonia?
(A)
3.01 x 1024
7.
What type of reaction is 4 H2O + 3 Fe → Fe3O4 + 4 H2
(A)
(D)
Combination (synthesis)
Double displacement
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 + H2O → H2 + NaOH
9.
How many grams of sodium fluoride (used in water fluoridation and manufacture of insecticides) are needed to form 97 g of sulfur
tetrafluoride?
3SCl2(l)
+
(B)
4NaF(s)
140
(C)
(B)
(E)
(B)
(E)
→ SF4(g)
(B)
Decomposition
Combustion
CaCO3 → CaO + CO2
NaCl + AgNO3 → AgCl + NaNO3
S2Cl2(l)
+
4NaCl(s)
(C)
97 g
(D)
35
(C)
Single displacement
(C)
14
H2 + O2 → 2 H2O
302 g
10.
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 46 g of barium hydroxide reacts with chloric acid?
(A)
46 g
11.
Calculate the mass in grams of 1.67 × 1023 molecules of CBr4.
(A)
92.1 g
(B)
10.8 g
14.42 g
(C)
(C)
9.7 g
0.278 g
2
(D)
(E)
(A)
(B)
151 g
+
70
41 g
(E)
10.2 g
(D)
5.4 g
(E)
2.44 g
(D)
0.0434 g
(E)
5.54 x 1025
12.
Which of the following samples contains the greatest number of moles of carbon atoms?
(A)
(B)
(C)
(D)
(E)
58 g of C4H10
46 g of C2H5OH
44 g of CO2
180 g of C6H12O6
all contain the same number of moles of carbon atoms
13.
Ammonia will react with fluorine to produce dinitrogen tetrafluoride and hydrogen fluoride (used in production of aluminum, in
uranium processing, and in frosting of light bulbs).
2NH3(g) + 5F2(g) → N2F4(g) + 6HF(g)
How many moles of NH3 are needed to react completely with 6.8 moles of F2?
(A)
17.0 mol
14.
The number of atoms in 9 g of aluminum is the same as the number of atoms in
(A)
(D)
8.1 g of magnesium.
24.3 g of magnesium.
15.
A reaction between Na2O and P4O10 forms Na3PO4. How many grams of Na3PO4 will be produced from the reaction of 0.400 mol
of Na2O with P4O10?
(A)
43.8 g
16.
When the following equation is balanced, what is the coefficient of C: Ca3(PO4)2(s) + SiO2(s) + C(s) → CaSiO3(s) + CO + P4
(A)
1
(B)
6.8 mol
(B)
(E)
(B)
(B)
65.6 g
2
(C)
3.40 mol
18.0 g of magnesium.
12.15 g of magnesium.
(C)
(C)
87.6 g
4
(D)
2.72 mo1
(C)
9.0 g of magnesium.
(D)
(D)
3
262 g
6
(E)
(E)
(E)
1.14 mol
24.8 g
10
17.
When the following equation is balanced using the smallest possible integral coefficients, what is the sum of all of the coefficients?
Cu + HNO3 → Cu(NO3)2 + NO2 + H2O
(A)
5
18.
Calcium fluoride is used to fluoridate drinking water. Calculate its molar mass in g/mol.
(A)
118.15
19.
What is the mass in grams of 0.50 mol of the common antacid calcium carbonate?
(A)
800 g
20.
Calculate the number of sodium atoms in 29.34 g of sodium sulfate, Na2SO4.
(A)
(D)
1.244 × 1023 Na atoms
2.915 × 1024 Na atoms
(B)
(B)
(B)
6
(C)
99.15
(C)
25.0 g
(C)
(B)
(E)
8
(D)
78.07
50.0 g
4.976 × 1023 Na atoms
1.166 × 1025 Na atoms
4
9
(E)
10
(D)
59.08
(E)
38.00
(D)
26.0 g
(E)
82.0 g
(C)
2.488 × 1023 Na atoms