Question 1

What is the name of the acid formed when H2S gas is dissolved in water?

Accepted Answer

A)  sulfuric acid 
B)  sulfurous acid 
C)  hydrosulfuric acid 
D)  hydrosulfurous acid 
E)  sulfidic acid 
A)  sulfuric acid 
B)  sulfurous acid 
C)  hydrosulfuric acid 
D)  hydrosulfurous acid 
E)  sulfidic acid

Question 2

Calcium hydroxide is used in mortar, plaster and cement. What is its formula?

Accepted Answer

A)  CaOH 
B)  CaOH2 
C)  Ca2OH 
D)  Ca(OH)2 
E)  CaHO2 
A)  CaOH 
B)  CaOH2 
C)  Ca2OH 
D)  Ca(OH)2 
E)  CaHO2

Question 3

All neutral atoms of tin have 50 protons and 50 electrons.

Accepted Answer

A) True 
 B)False

Question 4

One amu is defined as

Accepted Answer

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

Question 5

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 6

State the two important experimental results (and the names of the responsible scientists) which enabled the mass of the electron to be determined.

Accepted Answer

Thomson measured m/e, the mass

Question 7

Which one of the following groups does not contain any metals?

Accepted Answer

A)  C, S, As, H 
B)  Cu, P, Se, Kr 
C)  N, Ne, Nd, Np 
D)  Xe, Hg, Ge, O 
E)  Cl, Al, Si, Ar 
A)  C, S, As, H 
B)  Cu, P, Se, Kr 
C)  N, Ne, Nd, Np 
D)  Xe, Hg, Ge, O 
E)  Cl, Al, Si, Ar

Question 8

Atoms X, Y, Z, and R have the following nuclear compositions: 
  
Which two are isotopes?

Accepted Answer

A)  X & Y 
B)  X & R 
C)  Y & R 
D)  Z & R 
E)  X & Z 
A)  X & Y 
B)  X & R 
C)  Y & R 
D)  Z & R 
E)  X & Z

Question 9

Determine the molecular mass of iron (III) bromide hexahydrate, a substance used as a catalyst in organic reactions.

Accepted Answer

A)  403.65 amu 
B)  355.54 amu 
C)  317.61 amu 
D)  313.57 amu 
E)  295.56 amu 
A)  403.65 amu 
B)  355.54 amu 
C)  317.61 amu 
D)  313.57 amu 
E)  295.56 amu

Question 10

Who is credited with first measuring the charge 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 11

Ionic compounds may carry a net positive or negative charge.

Accepted Answer

A) True 
 B)False

Question 12

Tetrasulfur dinitride decomposes explosively when heated. What is its formula?

Accepted Answer

A)  S2N4 
B)  S4N2 
C)  4SN2 
D)  S4N 
E)  S2N 
A)  S2N4 
B)  S4N2 
C)  4SN2 
D)  S4N 
E)  S2N

Question 13

Lead (Pb) is a main-group element.

Accepted Answer

A) True 
 B)False

Question 14

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide. What is its chemical formula?

Accepted Answer

A)  I2O5 
B)  IO5 
C)  2IO5 
D)  I5O2 
E)  (IO5)2 
A)  I2O5 
B)  IO5 
C)  2IO5 
D)  I5O2 
E)  (IO5)2

Question 15

What is the name of PCl3?

Accepted Answer

A)  phosphorus chloride 
B)  phosphoric chloride 
C)  phosphorus trichlorate 
D)  trichlorophosphide 
E)  phosphorus trichloride 
A)  phosphorus chloride 
B)  phosphoric chloride 
C)  phosphorus trichlorate 
D)  trichlorophosphide 
E)  phosphorus trichloride

Question 16

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 17

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 18

When an atom is represented by the symbol   , the value of A is the

Accepted Answer

A)  number of neutrons in the atom. 
B)  number of protons in the atom. 
C)  atomic mass of the element. 
D)  total number of electrons and neutrons in the atom. 
E)  total number of protons and neutrons in the atom. 
A)  number of neutrons in the atom. 
B)  number of protons in the atom. 
C)  atomic mass of the element. 
D)  total number of electrons and neutrons in the atom. 
E)  total number of protons and neutrons in the atom.

Question 19

Ammonium sulfate, (NH4)2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Accepted Answer

A)  63.07 amu 
B)  114.l0 amu 
C)  118.13 amu 
D)  128.11 amu 
E)  132.13 amu 
A)  63.07 amu 
B)  114.l0 amu 
C)  118.13 amu 
D)  128.11 amu 
E)  132.13 amu

Question 20

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

Accepted Answer

A)  O2- oxide 
B)  Cd2+ cadmium 
C)  ClO3- chlorate 
D)  HCO3- hydrogen carbonate 
E)  NO2- nitrate 
A)  O2- oxide 
B)  Cd2+ cadmium 
C)  ClO3- chlorate 
D)  HCO3- hydrogen carbonate 
E)  NO2- nitrate

Exam 2: The Components of Matter

What is the name of the acid formed when H2S gas is dissolved in water?

Calcium hydroxide is used in mortar, plaster and cement. What is its formula?

All neutral atoms of tin have 50 protons and 50 electrons.

One amu is defined as

Which of the following elements are the least reactive?

State the two important experimental results (and the names of the responsible scientists) which enabled the mass of the electron to be determined.

Which one of the following groups does not contain any metals?

Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?

Determine the molecular mass of iron (III) bromide hexahydrate, a substance used as a catalyst in organic reactions.

Who is credited with first measuring the charge of the electron?

Ionic compounds may carry a net positive or negative charge.

Tetrasulfur dinitride decomposes explosively when heated. What is its formula?

Lead (Pb) is a main-group element.

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide. What is its chemical formula?

What is the name of PCl3?

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

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.

When an atom is represented by the symbol , the value of A is the

Ammonium sulfate, (NH4)2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

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

Keys to the Study of Chemistry

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 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

What is the name of the acid formed when H₂S gas is dissolved in water?

What is the name of PCl₃?

Ammonium sulfate, (NH₄)₂SO₄, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.