Question 1

The compound, (NH4)2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Accepted Answer

A) Ammonium sulfide 
B) Diammonium sulfide 
C) Ammonium sulfite 
D) Ammonia(I)sulfite 
E) Ammonium(I)sulfide 
A) Ammonium sulfide 
B) Diammonium sulfide 
C) Ammonium sulfite 
D) Ammonia(I)sulfite 
E) Ammonium(I)sulfide A

Question 2

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A) The small size of the nucleus 
B) The charge on the nucleus 
C) The total mass of the atom 
D) The existence of protons 
E) The presence of electrons outside the nucleus 
A) The small size of the nucleus 
B) The charge on the nucleus 
C) The total mass of the atom 
D) The existence of protons 
E) The presence of electrons outside the nucleus C

Question 3

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: −5.92; −4.44; −2.96; −8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Accepted Answer

A) −1.11 
B) −1.48 
C) −2.22 
D) −2.96 
E) −5.55 
A) −1.11 
B) −1.48 
C) −2.22 
D) −2.96 
E) −5.55 B

Question 4

Which of the following is a nonmetal?

Accepted Answer

A) Lithium, Li, Z = 3 
B) Bromine, Br, Z = 35 
C) Mercury, Hg, Z = 80 
D) Bismuth, Bi, Z = 83 
E) Sodium, Na, Z = 11 
A) Lithium, Li, Z = 3 
B) Bromine, Br, Z = 35 
C) Mercury, Hg, Z = 80 
D) Bismuth, Bi, Z = 83 
E) Sodium, Na, Z = 11

Question 5

Modern studies have shown that the Law of Multiple Proportions is not valid.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following compounds is covalent?

Accepted Answer

A) CaCl 2 
B) MgO 
C) Al 2O 3 
D) Cs 2S 
E) PCl 3 
A) CaCl 2 
B) MgO 
C) Al 2O 3 
D) Cs 2S 
E) PCl 3

Question 7

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Accepted Answer

A) Magnesium difluoride 
B) Magnesium fluoride 
C) Magnesium(II)fluoride 
D) Monomagnesium difluoride 
E) None of these choices are correct 
A) Magnesium difluoride 
B) Magnesium fluoride 
C) Magnesium(II)fluoride 
D) Monomagnesium difluoride 
E) None of these choices are correct

Question 8

Which, if any, of the following elements do not occur in the major classes of organic compounds?

Accepted Answer

A) H 
B) C 
C) N 
D) O 
E) All of these choices are correct. 
A) H 
B) C 
C) N 
D) O 
E) All of these choices are correct.

Question 9

Which of the following compounds is ionic?

Accepted Answer

A) PF 3 
B) CS 2 
C) HCl 
D) SO 2 
E) MgCl 2 
A) PF 3 
B) CS 2 
C) HCl 
D) SO 2 
E) MgCl 2

Question 10

What is the name of BBr3?

Accepted Answer

A) Boron bromide 
B) Boric bromide 
C) Boron tribromide 
D) Tribromoboride 
E) Bromine triboride 
A) Boron bromide 
B) Boric bromide 
C) Boron tribromide 
D) Tribromoboride 
E) Bromine triboride

Question 11

Which one of the following combinations of names and formulas is incorrect?

Accepted Answer

A) H 3PO 4 phosphoric acid 
B) HNO 3 nitric acid 
C) NaHCO 3 sodium carbonate 
D) H 2CO 3 carbonic acid 
E) KOH potassium hydroxide 
A) H 3PO 4 phosphoric acid 
B) HNO 3 nitric acid 
C) NaHCO 3 sodium carbonate 
D) H 2CO 3 carbonic acid 
E) KOH potassium hydroxide

Question 12

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Accepted Answer

A) 261.97 amu 
B) 238.98 amu 
C) 161.97 amu 
D) 138.98 amu 
E) 74.99 amu 
A) 261.97 amu 
B) 238.98 amu 
C) 161.97 amu 
D) 138.98 amu 
E) 74.99 amu

Question 13

Compound 1 has a composition of 46.7 mass % of element A and 53.3 mass % of element B. A and B also form a second binary compound (compound 2). If the compositions of the two compounds are consistent with the law of multiple proportions, which of the following compositions could be that of compound 2?

Accepted Answer

A) 23.4 mass % A 76.6 mass % B 
B) 30.4 mass % A 69.6 mass % B 
C) 33.3 mass % A 66.7 mass % B 
D) 53.3 mass % A 46.7 mass % B 
E) 73.3 mass % A 26.7 mass % B 
A) 23.4 mass % A 76.6 mass % B 
B) 30.4 mass % A 69.6 mass % B 
C) 33.3 mass % A 66.7 mass % B 
D) 53.3 mass % A 46.7 mass % B 
E) 73.3 mass % A 26.7 mass % B

Question 14

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81,   . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

Accepted Answer

A) 35, 46, 81 
B) 35, 81, 46 
C) 81, 46, 35 
D) 46, 81, 35 
E) 35, 81, 116 
A) 35, 46, 81 
B) 35, 81, 46 
C) 81, 46, 35 
D) 46, 81, 35 
E) 35, 81, 116

Question 15

The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Accepted Answer

A) Cobalt dichloride 
B) Cobalt(II)chloride 
C) Cobalt chloride 
D) Cobaltic chloride 
E) Copper(II)chloride 
A) Cobalt dichloride 
B) Cobalt(II)chloride 
C) Cobalt chloride 
D) Cobaltic chloride 
E) Copper(II)chloride

Question 16

Which of the following elements are the least reactive?

Accepted Answer

A) Alkali metals 
B) Noble gases 
C) Halogens 
D) Alkaline earth metals 
E) Metalloids 
A) Alkali metals 
B) Noble gases 
C) Halogens 
D) Alkaline earth metals 
E) Metalloids

Question 17

J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

Accepted Answer

A) the mass/charge ratio varied with as the cathode material was changed. 
B) the charge was always a whole-number multiple of some minimum charge. 
C) matter included particles much smaller than the atom. 
D) atoms contained dense areas of positive charge. 
E) atoms are largely empty space. 
A) the mass/charge ratio varied with as the cathode material was changed. 
B) the charge was always a whole-number multiple of some minimum charge. 
C) matter included particles much smaller than the atom. 
D) atoms contained dense areas of positive charge. 
E) atoms are largely empty space.

Question 18

Which of the following is a metalloid?

Accepted Answer

A) Carbon, C, Z = 6 
B) Sulfur, S, Z = 16 
C) Germanium, Ge, Z = 32 
D) Iridium, Z = 77 
E) Bromine, Br, Z = 35 
A) Carbon, C, Z = 6 
B) Sulfur, S, Z = 16 
C) Germanium, Ge, Z = 32 
D) Iridium, Z = 77 
E) Bromine, Br, Z = 35

Question 19

What is the name of the acid formed when HCN gas is dissolved in water?

Accepted Answer

A) Cyanic acid 
B) Hydrocyanic acid 
C) Cyanous acid 
D) Hydrocyanous acid 
E) Hydrogen cyanide 
A) Cyanic acid 
B) Hydrocyanic acid 
C) Cyanous acid 
D) Hydrocyanous acid 
E) Hydrogen cyanide

Question 20

Which of the following symbols does not represent an element?

Accepted Answer

A) O 2 
B) Co 
C) HF 
D) Cs 
E) Xe 
A) O 2 
B) Co 
C) HF 
D) Cs 
E) Xe

Exam 2: The Components of Matter

The compound, (NH4)2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: −5.92; −4.44; −2.96; −8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Which of the following is a nonmetal?

Modern studies have shown that the Law of Multiple Proportions is not valid.

Which of the following compounds is covalent?

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Which, if any, of the following elements do not occur in the major classes of organic compounds?

Which of the following compounds is ionic?

What is the name of BBr3?

Which one of the following combinations of names and formulas is incorrect?

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Bromine is the only nonmetal that is a liquid at room temperature. Consider the isotope bromine-81, . Select the combination which lists the correct atomic number, neutron number, and mass number, respectively.

The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Which of the following elements are the least reactive?

J. J. Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio. His results showed that

Which of the following is a metalloid?

What is the name of the acid formed when HCN gas is dissolved in water?

Which of the following symbols does not represent an element?

Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and Reaction Direction

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

The compound, (NH₄)₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

The colorless substance, MgF₂, is used in the ceramics and glass industry. What is its name?

What is the name of BBr₃?

The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?