Question 1

Calculate the molecular masses of the following:
a. Cl2
b. H2O2
c. (NH4)2SO4
d. Ba(NO3)2

Accepted Answer

a. 70.90 amu
b. 34.0

Question 2

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 3

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 4

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 5

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 the above, since they are all misspelled 
A)  magnesium difluoride 
B)  magnesium fluoride 
C)  magnesium(II) fluoride 
D)  monomagnesium difluoride 
E)  none of the above, since they are all misspelled

Question 6

Millikan's oil-drop experiment

Accepted Answer

A)  established the charge on an electron. 
B)  showed that all oil drops carried the same charge. 
C)  provided support for the nuclear model of the atom. 
D)  suggested that some oil drops carried fractional numbers of electrons. 
E)  suggested the presence of a neutral particle in the atom. 
A)  established the charge on an electron. 
B)  showed that all oil drops carried the same charge. 
C)  provided support for the nuclear model of the atom. 
D)  suggested that some oil drops carried fractional numbers of electrons. 
E)  suggested the presence of a neutral particle in the atom.

Question 7

The substance, CaSe, is used in materials which are electron emitters. What is its name?

Accepted Answer

A)  calcium monoselenide 
B)  calcium(II) selenide 
C)  calcium selenide 
D)  calcium(I) selenide 
E)  calcium(II) selenium 
A)  calcium monoselenide 
B)  calcium(II) selenide 
C)  calcium selenide 
D)  calcium(I) selenide 
E)  calcium(II) selenium

Question 8

In the ionic compound with the general formula M2X3, the likely charge on X is

Accepted Answer

A)  +1. 
B)  +3. 
C)  -1. 
D)  -2. 
E)  -3. 
A)  +1. 
B)  +3. 
C)  -1. 
D)  -2. 
E)  -3.

Question 9

The chemical symbol for potassium is

Accepted Answer

A)  P. 
B)  Po. 
C)  Pt. 
D)  Pm. 
E)  K. 
A)  P. 
B)  Po. 
C)  Pt. 
D)  Pm. 
E)  K.

Question 10

Rutherford bombarded gold foil with alpha (F1F1F1S1F1F1F10) 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

Question 11

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 12

What is the name of IF7?

Accepted Answer

A)  iodine fluoride 
B)  iodic fluoride 
C)  iodine heptafluoride 
D)  heptafluoroiodide 
E)  heptafluorine iodide 
A)  iodine fluoride 
B)  iodic fluoride 
C)  iodine heptafluoride 
D)  heptafluoroiodide 
E)  heptafluorine iodide

Question 13

Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers. What is its formula?

Accepted Answer

A)  NaO 
B)  NaO2 
C)  Na2O2 
D)  Na2O 
E)  NaH2O2 
A)  NaO 
B)  NaO2 
C)  Na2O2 
D)  Na2O 
E)  NaH2O2

Question 14

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

Accepted Answer

A)  bromic acid 
B)  bromous acid 
C)  hydrobromic acid 
D)  hydrobromous acid 
E)  hydrobromidic acid 
A)  bromic acid 
B)  bromous acid 
C)  hydrobromic acid 
D)  hydrobromous acid 
E)  hydrobromidic acid

Question 15

Which of the following is the empirical formula for hexane, C6H14?

Accepted Answer

A)  C12H28 
B)  C6H14 
C)  C3H7 
D)  CH2.3 
E)  C0.43H 
A)  C12H28 
B)  C6H14 
C)  C3H7 
D)  CH2.3 
E)  C0.43H

Question 16

What is the name of Na2O?

Accepted Answer

A)  disodium monoxide 
B)  sodium monoxide 
C)  sodium dioxide 
D)  sodium(I) oxide 
E)  sodium oxide 
A)  disodium monoxide 
B)  sodium monoxide 
C)  sodium dioxide 
D)  sodium(I) oxide 
E)  sodium oxide

Question 17

Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?

Accepted Answer

A)  BaF2, ionic compound 
B)  BaF2, covalent compound 
C)  BaF, ionic compound 
D)  BaF, covalent compound 
E)  Ba2F, ionic compound 
A)  BaF2, ionic compound 
B)  BaF2, covalent compound 
C)  BaF, ionic compound 
D)  BaF, covalent compound 
E)  Ba2F, ionic compound

Question 18

Barium sulfate is used in manufacturing photographic paper. What is its formula?

Accepted Answer

A)  BaSO4 
B)  Ba(SO4)2 
C)  Ba2SO4 
D)  Ba2(SO4)3 
E)  BaSO3 
A)  BaSO4 
B)  Ba(SO4)2 
C)  Ba2SO4 
D)  Ba2(SO4)3 
E)  BaSO3

Question 19

What is the chemical symbol for the group 6A (16) element that lies in period 4?

Accepted Answer

A)  Cr 
B)  Hf 
C)  W 
D)  Ti 
E)  Se 
A)  Cr 
B)  Hf 
C)  W 
D)  Ti 
E)  Se

Question 20

The name for HF(g) is

Accepted Answer

A)  hydrofluoric acid. 
B)  hydrogen(I) fluoride. 
C)  hydrogen fluoride. 
D)  hydrogen fluorine. 
E)  fluoric acid. 
A)  hydrofluoric acid. 
B)  hydrogen(I) fluoride. 
C)  hydrogen fluoride. 
D)  hydrogen fluorine. 
E)  fluoric acid.

Exam 2: The Components of Matter

Calculate the molecular masses of the following: a. Cl2 b. H2O2 c. (NH4)2SO4 d. Ba(NO3)2

What is the name of BBr3?

What is the name of PCl3?

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

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

Millikan's oil-drop experiment

The substance, CaSe, is used in materials which are electron emitters. What is its name?

In the ionic compound with the general formula M2X3, the likely charge on X is

The chemical symbol for potassium is

Rutherford bombarded gold foil with alpha () 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?

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

What is the name of IF7?

Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers. What is its formula?

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

Which of the following is the empirical formula for hexane, C6H14?

What is the name of Na2O?

Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?

Barium sulfate is used in manufacturing photographic paper. What is its formula?

What is the chemical symbol for the group 6A (16) element that lies in period 4?

The name for HF(g) is

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

Calculate the molecular masses of the following: a. Cl₂ b. H₂O₂ c. (NH₄)₂SO₄ d. Ba(NO₃)₂

What is the name of BBr₃?

What is the name of PCl₃?

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

In the ionic compound with the general formula M₂X₃, the likely charge on X is

What is the name of IF₇?

Which of the following is the empirical formula for hexane, C₆H₁₄?

What is the name of Na₂O?