Question 1

Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

Accepted Answer

A)  Fe(ClF1F1F1S1F1F1F106H2O)3 
B)  Fe3ClF1F1F1S1F1F1F106H2O 
C)  FeCl3(H2O)6 
D)  Fe3Cl(H2O)6 
E)  FeCl3F1F1F1S1F1F1F106H2O 
A)  Fe(ClF1F1F1S1F1F1F106H2O)3 
B)  Fe3ClF1F1F1S1F1F1F106H2O 
C)  FeCl3(H2O)6 
D)  Fe3Cl(H2O)6 
E)  FeCl3F1F1F1S1F1F1F106H2O

Question 2

Name the three important "laws" that were accounted for by Dalton's atomic theory.

Accepted Answer

laws of conservation

Question 3

The molecular formula of a compound provides more information than its structural formula.

Accepted Answer

A) True 
 B)False

Question 4

Copper (Cu) is a transition metal.

Accepted Answer

A) True 
 B)False

Question 5

What is the formula for lithium nitrite?

Accepted Answer

A)  LiNO2 
B)  Li2NO2 
C)  LiNO3 
D)  Li2NO3 
E)  LiNO4 
A)  LiNO2 
B)  Li2NO2 
C)  LiNO3 
D)  Li2NO3 
E)  LiNO4

Question 6

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 7

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

Accepted Answer

A)  O2- oxide 
B)  Al3+ aluminum 
C)  NO3- nitrate 
D)  PO43- phosphate 
E)  CrO42- chromate 
A)  O2- oxide 
B)  Al3+ aluminum 
C)  NO3- nitrate 
D)  PO43- phosphate 
E)  CrO42- chromate

Question 8

Who is credited with measuring the mass/charge ratio of the electron?

Accepted Answer

A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford 
A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford

Question 9

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

Accepted Answer

A)  NaO, ionic compound 
B)  NaO, covalent compound 
C)  Na2O, ionic compound 
D)  Na2O, covalent compound 
E)  Na2O2, ionic compound 
A)  NaO, ionic compound 
B)  NaO, covalent compound 
C)  Na2O, ionic compound 
D)  Na2O, covalent compound 
E)  Na2O2, ionic compound

Question 10

Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Accepted Answer

A)  77.9 amu 
B)  80.0 amu 
C)  80.1 amu 
D)  80.9 amu 
E)  88.9 amu 
A)  77.9 amu 
B)  80.0 amu 
C)  80.1 amu 
D)  80.9 amu 
E)  88.9 amu

Question 11

Which of the following ions occurs commonly?

Accepted Answer

A)  P3+ 
B)  Br7+ 
C)  O6+ 
D)  Ca2+ 
E)  K- 
A)  P3+ 
B)  Br7+ 
C)  O6+ 
D)  Ca2+ 
E)  K-

Question 12

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 13

a. Give the names of the following ions:
(i) NH4+
(ii) SO32-
b. Write down the formulas of the following ions:
(i) aluminum
(ii) carbonate

Accepted Answer

a. (i) amm

Question 14

Select the incorrect statement about elements and compounds.

Accepted Answer

A)  All ionic compounds are neutral. 
B)  Some elements exist as molecules. 
C)  The bonding in compounds may be covalent or ionic. 
D)  The molecular formula of a compound provides more information than the structural formula. 
E)  Among the elements, there are more metals than non-metals. 
A)  All ionic compounds are neutral. 
B)  Some elements exist as molecules. 
C)  The bonding in compounds may be covalent or ionic. 
D)  The molecular formula of a compound provides more information than the structural formula. 
E)  Among the elements, there are more metals than non-metals.

Question 15

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 the above elements occur in the major classes of organic compounds. 
A)  H 
B)  C 
C)  N 
D)  O 
E)  All the above elements occur in the major classes of organic compounds.

Question 16

One amu is defined as

Accepted Answer

A)  the mass of a proton. 
B)  1/12 the mass of an atom of   . 
C)  the mass of an atom of   . 
D)  1/20 the mass of an atom of   . 
E)  1/16 the mass of an atom of   . 
A)  the mass of a proton. 
B)  1/12 the mass of an atom of   . 
C)  the mass of an atom of   . 
D)  1/20 the mass of an atom of   . 
E)  1/16 the mass of an atom of   .

Question 17

What is the formula for magnesium sulfide?

Accepted Answer

A)  MgS 
B)  MgS2 
C)  Mg2S 
D)  Mg2S3 
E)  MgSO4 
A)  MgS 
B)  MgS2 
C)  Mg2S 
D)  Mg2S3 
E)  MgSO4

Question 18

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford 
A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford

Question 19

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

Question 20

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Accepted Answer

A)  (ClO)2 
B)  Cl2O 
C)  Cl2O2 
D)  Cl2O4 
E)  ClO2 
A)  (ClO)2 
B)  Cl2O 
C)  Cl2O2 
D)  Cl2O4 
E)  ClO2

Exam 2: The Components of Matter

Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

Name the three important "laws" that were accounted for by Dalton's atomic theory.

The molecular formula of a compound provides more information than its structural formula.

Copper (Cu) is a transition metal.

What is the formula for lithium nitrite?

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

Who is credited with measuring the mass/charge ratio of the electron?

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Which of the following ions occurs commonly?

Which of the following elements are the least reactive?

a. Give the names of the following ions: (i) NH4+ (ii) SO32- b. Write down the formulas of the following ions: (i) aluminum (ii) carbonate

Select the incorrect statement about elements and compounds.

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

One amu is defined as

What is the formula for magnesium sulfide?

Who is credited with discovering the atomic nucleus?

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

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Keys to the Study of Chemistry

Stoichiometry of Formulas and Equations

The 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: Bonding, Structure, and Reactivity

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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?

Bromine has two naturally-occurring isotopes. ⁷⁹Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

a. Give the names of the following ions: (i) NH₄⁺ (ii) SO₃^2- b. Write down the formulas of the following ions: (i) aluminum (ii) carbonate

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