Question 1

Calculate the mass of 8.04 × 10-3 mol of O2.

Accepted Answer

A)  2.51 × 10-4 g 
B)  5.03 × 10-4 g 
C)  0.129 g 
D)  3.89 g 
E)  0.257 g 
A)  2.51 × 10-4 g 
B)  5.03 × 10-4 g 
C)  0.129 g 
D)  3.89 g 
E)  0.257 g

Question 2

A sample of an element consists of two isotopes.The percent abundance of one of the isotopes is 75.0%.What is the percent abundance of the other isotope?

Accepted Answer

A)  62.5% 
B)  37.5% 
C)  12.5% 
D)  75.0% 
E)  25.0% 
A)  62.5% 
B)  37.5% 
C)  12.5% 
D)  75.0% 
E)  25.0%

Question 3

Silver has two stable isotopes with masses of 106.90509 u and 108.9047 u.The atomic weight of silver is 107.868 u.What is the percent abundance of each isotope?

Accepted Answer

A)  50.0% 107Ag and 50.0% 109Ag 
B)  51.8% 107Ag and 48.2% 109Ag 
C)  55.4% 107Ag and 44.6% 109Ag 
D)  48.2% 107Ag and 51.8% 109Ag 
E)  44.6% 107Ag and 55.4% 109Ag 
A)  50.0% 107Ag and 50.0% 109Ag 
B)  51.8% 107Ag and 48.2% 109Ag 
C)  55.4% 107Ag and 44.6% 109Ag 
D)  48.2% 107Ag and 51.8% 109Ag 
E)  44.6% 107Ag and 55.4% 109Ag

Question 4

Which of the following groups of periodic table contains only nonmetals?

Accepted Answer

A)  2A 
B)  3A 
C)  5A 
D)  6A 
E)  7A 
A)  2A 
B)  3A 
C)  5A 
D)  6A 
E)  7A

Question 5

Which of the following atoms of elements is most likely to form a 2+ ion?

Accepted Answer

A)  Scandium 
B)  Calcium 
C)  Aluminum 
D)  Oxygen 
E)  Fluorine 
A)  Scandium 
B)  Calcium 
C)  Aluminum 
D)  Oxygen 
E)  Fluorine

Question 6

A 0.4272 g sample of an element contains 2.241 × 1021 atoms.What is the symbol of the element?

Accepted Answer

A)  In 
B)  Cs 
C)  Sb 
D)  Xe 
E)  Te 
A)  In 
B)  Cs 
C)  Sb 
D)  Xe 
E)  Te

Question 7

Pure oxygen can exist as O2 or O3.Elements that exist in more than one distinct form are called _____.

Accepted Answer

Question 8

Atoms are made of three subatomic particles.What are these particles and their charges?

Accepted Answer

A)  proton (+1),neutron (0),and electron (−1) 
B)  proton (−1),neutron (+1),and electron (0) 
C)  proton (+1),neutron (−1),and electron (0) 
D)  proton (0),neutron (+1),and electron (−1) 
E)  proton (−1),neutron (0),and electron (+1) 
A)  proton (+1),neutron (0),and electron (−1) 
B)  proton (−1),neutron (+1),and electron (0) 
C)  proton (+1),neutron (−1),and electron (0) 
D)  proton (0),neutron (+1),and electron (−1) 
E)  proton (−1),neutron (0),and electron (+1)

Question 9

What is the common name of the group that has an element with 38 protons in its nucleus?

Accepted Answer

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

Question 10

An atom that has the same number of neutrons as nickel-59 is _____.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 11

In a reaction,metals generally lose electrons to become _____,and nonmetals gain electrons to become anions.

Accepted Answer

The answer of In a reaction,metals generally lose electrons to...

Question 12

Which of the following is the correct formula for cobalt(III)bromide?

Accepted Answer

A)  CoBr 
B)  CoBr3 
C)  Co2Br3 
D)  Co3Br2 
E)  Co3Br 
A)  CoBr 
B)  CoBr3 
C)  Co2Br3 
D)  Co3Br2 
E)  Co3Br

Question 13

Which of the following is the common name for the compound PH3?

Accepted Answer

A)  Laughing gas 
B)  Hydrazine 
C)  Nitroglycerin 
D)  Ammonia 
E)  Phosphine 
A)  Laughing gas 
B)  Hydrazine 
C)  Nitroglycerin 
D)  Ammonia 
E)  Phosphine

Question 14

Atomic number is equal to the _____ in the nucleus of an atom.

Accepted Answer

A)  number of electrons 
B)  number of protons 
C)  number of protons minus the number of neutrons 
D)  sum of the number of electrons and neutrons 
E)  sum of the number of neutrons and protons 
A)  number of electrons 
B)  number of protons 
C)  number of protons minus the number of neutrons 
D)  sum of the number of electrons and neutrons 
E)  sum of the number of neutrons and protons

Question 15

Which of the following is the correct name for the compound NH4NO3?

Accepted Answer

A)  Ammonia hydrogen nitrate 
B)  Ammonia hydrogen nitride 
C)  Ammonium nitric acid 
D)  Ammonium nitrate 
E)  Ammonium nitride 
A)  Ammonia hydrogen nitrate 
B)  Ammonia hydrogen nitride 
C)  Ammonium nitric acid 
D)  Ammonium nitrate 
E)  Ammonium nitride

Question 16

The correct name for Cd2+ is _____.

Accepted Answer

A)  monocadmium ion 
B)  cadmium(II)ion 
C)  cadmium(2)ion 
D)  cadmium(I)ion 
E)  cadmium 
A)  monocadmium ion 
B)  cadmium(II)ion 
C)  cadmium(2)ion 
D)  cadmium(I)ion 
E)  cadmium

Question 17

Which of the following is the correct name for the compound CCl4?

Accepted Answer

A)  Carbon chlorine 
B)  Tetracarbon chloride 
C)  Carbon tetrachloride 
D)  Carbon(IV)chloride 
E)  Tetrachlorocarbide 
A)  Carbon chlorine 
B)  Tetracarbon chloride 
C)  Carbon tetrachloride 
D)  Carbon(IV)chloride 
E)  Tetrachlorocarbide

Question 18

A molecule is found to contain 47.35% C,10.60% H,and 42.05% O by mass.Determine the empirical formula for this molecule.

Accepted Answer

A)  C2H6O 
B)  C3H4O 
C)  C3H8O2 
D)  C4H6O2 
E)  C4H8O3 
A)  C2H6O 
B)  C3H4O 
C)  C3H8O2 
D)  C4H6O2 
E)  C4H8O3

Question 19

Millikan's oil drop experiment determined the charge of the _____.

Accepted Answer

The answer of Millikan's oil drop experiment determined the charge...

Question 20

The formula of acetic acid,CH3CO2H,is an example of a(n)_____.

Accepted Answer

A)  condensed formula 
B)  empirical formula 
C)  structural formula 
D)  ionic compound formula 
E)  elemental formula 
A)  condensed formula 
B)  empirical formula 
C)  structural formula 
D)  ionic compound formula 
E)  elemental formula

Exam 3: Atoms, molecules, and Ions

Calculate the mass of 8.04 × 10-3 mol of O2.

A sample of an element consists of two isotopes.The percent abundance of one of the isotopes is 75.0%.What is the percent abundance of the other isotope?

Silver has two stable isotopes with masses of 106.90509 u and 108.9047 u.The atomic weight of silver is 107.868 u.What is the percent abundance of each isotope?

Which of the following groups of periodic table contains only nonmetals?

Which of the following atoms of elements is most likely to form a 2+ ion?

A 0.4272 g sample of an element contains 2.241 × 1021 atoms.What is the symbol of the element?

Pure oxygen can exist as O2 or O3.Elements that exist in more than one distinct form are called _____.

Atoms are made of three subatomic particles.What are these particles and their charges?

What is the common name of the group that has an element with 38 protons in its nucleus?

An atom that has the same number of neutrons as nickel-59 is _____.

In a reaction,metals generally lose electrons to become _____,and nonmetals gain electrons to become anions.

Which of the following is the correct formula for cobalt(III)bromide?

Which of the following is the common name for the compound PH3?

Atomic number is equal to the _____ in the nucleus of an atom.

Which of the following is the correct name for the compound NH4NO3?

The correct name for Cd2+ is _____.

Which of the following is the correct name for the compound CCl4?

A molecule is found to contain 47.35% C,10.60% H,and 42.05% O by mass.Determine the empirical formula for this molecule.

Millikan's oil drop experiment determined the charge of the _____.

The formula of acetic acid,CH3CO2H,is an example of a(n)_____.

Basic Concepts of Chemistry

Lets Review: The Tools of Quantitative Chemistry

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Calculate the mass of 8.04 × 10^-3 mol of O₂.

A 0.4272 g sample of an element contains 2.241 × 10²¹ atoms.What is the symbol of the element?

Pure oxygen can exist as O₂ or O₃.Elements that exist in more than one distinct form are called _____.

Which of the following is the common name for the compound PH₃?

Which of the following is the correct name for the compound NH₄NO₃?

The correct name for Cd²⁺ is _____.

Which of the following is the correct name for the compound CCl₄?

The formula of acetic acid,CH₃CO₂H,is an example of a(n)_____.