Question 1

Finish the following reaction:
SnO2 + NaOH(aq)+ H2O(l)→

Accepted Answer

A) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Na2Sn(OH)6(s)  
B) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)2(s)+ 2 NaO(s)+ 2 H2O(l) 
C) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)4(s)+ 2 NaO(s)+ H2(g) 
D) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)2(s)+ 2 Na(s)+ 2 H2O2(aq) 
E) There is no reaction. 
A) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Na2Sn(OH)6(s)  
B) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)2(s)+ 2 NaO(s)+ 2 H2O(l) 
C) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)4(s)+ 2 NaO(s)+ H2(g) 
D) SnO2(s)+ 2 NaOH(aq)+ 2 H2O(l)→ Sn(OH)2(s)+ 2 Na(s)+ 2 H2O2(aq) 
E) There is no reaction.

Question 2

Which of the following statements about the use of sodium is FALSE?

Accepted Answer

A) Sodium vapor lamps are used outdoors. 
B) Sodium is used in reactors because it has a low melting point. 
C) Sodium is used in reactors because it has a high boiling point. 
D) Sodium is used in reactors because it has a high thermal conductivity. 
E) A typical sodium vapor lamp uses several grams of sodium. 
A) Sodium vapor lamps are used outdoors. 
B) Sodium is used in reactors because it has a low melting point. 
C) Sodium is used in reactors because it has a high boiling point. 
D) Sodium is used in reactors because it has a high thermal conductivity. 
E) A typical sodium vapor lamp uses several grams of sodium.

Question 3

Predict the shape of cyanogen, (CN)2.

Accepted Answer

A) linear 
B) bent 
C) tetrahedral 
D) trigonal pyramidal 
E) square planar 
A) linear 
B) bent 
C) tetrahedral 
D) trigonal pyramidal 
E) square planar

Question 4

In diborane,B2H6,the hybridization of each boron is:

Accepted Answer

A) sp3 
B) sp2 
C) sp3d 
D) sp 
E) sp3d2 
A) sp3 
B) sp2 
C) sp3d 
D) sp 
E) sp3d2

Question 5

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [Ka for hypochlorous acid is 2.9 × 10-8]

Accepted Answer

A) 1.70 
B) 4.62 
C) 8.16 
D) 9.92 
E) 12.30 
A) 1.70 
B) 4.62 
C) 8.16 
D) 9.92 
E) 12.30

Question 6

The production of lead is a two step process:
2 PbS(s)+ 3 O2(g)   2 PbO(s)+ 2 SO2(g)
2 PbO(s)+ C(s)   2 Pb(l)+ CO2(g)
How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

Accepted Answer

A) 0.721 kg 
B) 200 kg 
C) 2.67 kg 
D) 133 kg 
E) 267 kg 
A) 0.721 kg 
B) 200 kg 
C) 2.67 kg 
D) 133 kg 
E) 267 kg

Question 7

Bronze is 90% Cu and 10% Sn by mass.What is the density of bronze if the density of Cu
Is 8.95 g/cm3 and the density of Sn is 5.77 g/cm3?

Accepted Answer

A) 7.36 
B) 6.07 
C) 8.06 
D) 14.72 
E) 8.63 
A) 7.36 
B) 6.07 
C) 8.06 
D) 14.72 
E) 8.63

Question 8

Which of the following is a weak acid?

Accepted Answer

A) B(OH)3 
B) HI 
C) B(OH)4- 
D) B2(O2)2(OH)42- 
A) B(OH)3 
B) HI 
C) B(OH)4- 
D) B2(O2)2(OH)42-

Question 9

The atomic radius of calcium is smaller than that of strontium.

Accepted Answer

A) True 
 B)False

Question 10

An aqueous solution of boric acid can be represented by the equilibrium system:
B(OH)3(aq)+ 2 H2O(l)⇌ H3O+(aq)+ B(OH)4-(aq)(Ka = 5.6 × 10-10)
What is the pH of an eyewash solution which is 0.0018 M in boric acid?

Accepted Answer

A) 3.75 
B) 4.75 
C) 6.00 
D) 7.49 
E) 9.25 
A) 3.75 
B) 4.75 
C) 6.00 
D) 7.49 
E) 9.25

Question 11

How much tin is needed to make a bronze piece that will contain 475 g of copper? Bronze is 90% Cu and 10% Sn by mass.

Accepted Answer

A) 4.3 × 103 g 
B) 890 g 
C) 48 g 
D) 52.8 g 
E) 430 g 
A) 4.3 × 103 g 
B) 890 g 
C) 48 g 
D) 52.8 g 
E) 430 g

Question 12

For which of the following elements would be wrong to call the oxide "amphoteric"?

Accepted Answer

A) Tl 
B) Al 
C) Be 
D) Ga 
A) Tl 
B) Al 
C) Be 
D) Ga

Question 13

The first ionization energy of calcium is smaller than that of strontium.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following metals reacts most violently with water?

Accepted Answer

A) Cs 
B) Na 
C) Mg 
D) Ba 
A) Cs 
B) Na 
C) Mg 
D) Ba

Question 15

Pick the nonmetal in Group 13 (3A).

Accepted Answer

A) Al 
B) Ga 
C) In 
D) B 
E) Tl 
A) Al 
B) Ga 
C) In 
D) B 
E) Tl

Question 16

Choose the INCORRECT statement about carbon.

Accepted Answer

A) In addition to diamonds and graphite,fullerenes and nanotubes are allotropes. 
B) The finely divided soot from an incomplete combustion of natural gas is called carbon black. 
C) Coke is the result of heating coal in the absence of air. 
D) Charcoal is the result of heating wood in the absence of air. 
E) Diamond is an excellent conductor. 
A) In addition to diamonds and graphite,fullerenes and nanotubes are allotropes. 
B) The finely divided soot from an incomplete combustion of natural gas is called carbon black. 
C) Coke is the result of heating coal in the absence of air. 
D) Charcoal is the result of heating wood in the absence of air. 
E) Diamond is an excellent conductor.

Question 17

Finish the following reaction:
Li(s)+ O2(g)→

Accepted Answer

A) 2 Li(s)+ O2(g)→ Li2O2(s) 
B) 2 Li(s)+ O2(g)→ 2 LiO(s) 
C) 4 Li(s)+ O2(g)→ 2 Li2O(s) 
D) Li(s)+ O2(g)→ LiO2(s) 
E) There is no reaction. 
A) 2 Li(s)+ O2(g)→ Li2O2(s) 
B) 2 Li(s)+ O2(g)→ 2 LiO(s) 
C) 4 Li(s)+ O2(g)→ 2 Li2O(s) 
D) Li(s)+ O2(g)→ LiO2(s) 
E) There is no reaction.

Question 18

Write an equation for the roasting of PbS.

Accepted Answer

A) 2 PbS(s)+ 2 O2(g)→ 2 PbO2(s)+ S2(s) 
B) 2 PbS(s)+ 3 O2(g)→ 2 PbO(s)+ 2 SO2(s) 
C) 8 PbS(s)+ 4 O2(g)→ 8 PbO(s)+ S8(s) 
D) 2 PbS(s)+ O2(g)→ 2 PbO(s)+ 2 S(s) 
E) There is no reaction. 
A) 2 PbS(s)+ 2 O2(g)→ 2 PbO2(s)+ S2(s) 
B) 2 PbS(s)+ 3 O2(g)→ 2 PbO(s)+ 2 SO2(s) 
C) 8 PbS(s)+ 4 O2(g)→ 8 PbO(s)+ S8(s) 
D) 2 PbS(s)+ O2(g)→ 2 PbO(s)+ 2 S(s) 
E) There is no reaction.

Question 19

Choose the INCORRECT statement.

Accepted Answer

A) Potassium chloride is used in fertilizers. 
B) All alkali metals react alike. 
C) Sodium carbonate is called soda ash. 
D) Sodium carbonate usually comes from natural sources such as dry lake beds. 
E) Sodium carbonate can be made by the Solvay process. 
A) Potassium chloride is used in fertilizers. 
B) All alkali metals react alike. 
C) Sodium carbonate is called soda ash. 
D) Sodium carbonate usually comes from natural sources such as dry lake beds. 
E) Sodium carbonate can be made by the Solvay process.

Question 20

A magnesium fire can always be extinguished with carbon dioxide.

Accepted Answer

A) True 
 B)False

Exam 21: Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Finish the following reaction: SnO2 + NaOH(aq)+ H2O(l)→

Which of the following statements about the use of sodium is FALSE?

Predict the shape of cyanogen, (CN)2.

In diborane,B2H6,the hybridization of each boron is:

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [Ka for hypochlorous acid is 2.9 × 10-8]

The production of lead is a two step process: 2 PbS(s)+ 3 O2(g) 2 PbO(s)+ 2 SO2(g) 2 PbO(s)+ C(s) 2 Pb(l)+ CO2(g) How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

Bronze is 90% Cu and 10% Sn by mass.What is the density of bronze if the density of Cu Is 8.95 g/cm3 and the density of Sn is 5.77 g/cm3?

Which of the following is a weak acid?

The atomic radius of calcium is smaller than that of strontium.

An aqueous solution of boric acid can be represented by the equilibrium system: B(OH)3(aq)+ 2 H2O(l)⇌ H3O+(aq)+ B(OH)4-(aq)(Ka = 5.6 × 10-10) What is the pH of an eyewash solution which is 0.0018 M in boric acid?

How much tin is needed to make a bronze piece that will contain 475 g of copper? Bronze is 90% Cu and 10% Sn by mass.

For which of the following elements would be wrong to call the oxide "amphoteric"?

The first ionization energy of calcium is smaller than that of strontium.

Which of the following metals reacts most violently with water?

Pick the nonmetal in Group 13 (3A).

Choose the INCORRECT statement about carbon.

Finish the following reaction: Li(s)+ O2(g)→

Write an equation for the roasting of PbS.

Choose the INCORRECT statement.

A magnesium fire can always be extinguished with carbon dioxide.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Finish the following reaction: SnO₂ + NaOH(aq)+ H₂O(l)→

Predict the shape of cyanogen, (CN)₂.

In diborane,B₂H₆,the hybridization of each boron is:

What is the pH of a solution labeled "0.020 M Potassium Hypochlorite"? [K_a for hypochlorous acid is 2.9 × 10^-8]

The production of lead is a two step process: 2 PbS(s)+ 3 O₂(g) 2 PbO(s)+ 2 SO₂(g) 2 PbO(s)+ C(s) 2 Pb(l)+ CO₂(g) How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

Bronze is 90% Cu and 10% Sn by mass.What is the density of bronze if the density of Cu Is 8.95 g/cm³ and the density of Sn is 5.77 g/cm³?

An aqueous solution of boric acid can be represented by the equilibrium system: B(OH)₃(aq)+ 2 H₂O(l)⇌ H₃O⁺(aq)+ B(OH)₄^-(aq)(K_a = 5.6 × 10^-10) What is the pH of an eyewash solution which is 0.0018 M in boric acid?

Finish the following reaction: Li(s)+ O₂(g)→