Question 1

Atoms consist of three fundamental particles.What are these particles and their charges?

Accepted Answer

A)  proton (+1),neutron (neutral)and electron (-1) 
B)  proton (-1),neutron (+1)and electron (neutral) 
C)  proton (+1),neutron (-1)and electron (neutral) 
D)  proton (neutral),neutron (+1)and electron (-1) 
E)  proton (-1),neutron (neutral)and electron (+1) 
A)  proton (+1),neutron (neutral)and electron (-1) 
B)  proton (-1),neutron (+1)and electron (neutral) 
C)  proton (+1),neutron (-1)and electron (neutral) 
D)  proton (neutral),neutron (+1)and electron (-1) 
E)  proton (-1),neutron (neutral)and electron (+1)

Question 2

What mass of Al contains the same number of atoms as 3.0 g Pb?

Accepted Answer

A)  23 g 
B)  0.014 g 
C)  3.0 g 
D)  0.39 g 
E)  0.11 g 
A)  23 g 
B)  0.014 g 
C)  3.0 g 
D)  0.39 g 
E)  0.11 g

Question 3

What is the correct formula for an ionic compound that contains barium ions and carbonate ions?

Accepted Answer

A)  BaCO3 
B)  Ba(HCO3)2 
C)  Ba2CO3 
D)  Ba2C 
E)  Ba(CO3)2 
A)  BaCO3 
B)  Ba(HCO3)2 
C)  Ba2CO3 
D)  Ba2C 
E)  Ba(CO3)2

Question 4

What is the mass of chlorine-35 relative to carbon-12?

Accepted Answer

A)  0.657 
B)  0.522 
C)  1.52 
D)  2.92 
E)  23 
A)  0.657 
B)  0.522 
C)  1.52 
D)  2.92 
E)  23

Question 5

What is the common name of the group that has as one of its members the element which contains 4 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 6

William Crookes was this first to observe particles produced from a cathode ray tube.These particles eventually became known as ________.

Accepted Answer

The answer of William Crookes was this first to observe...

Question 7

An ionic compound has the formula MCl2.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

Accepted Answer

A)  Ni 
B)  Cu 
C)  Sn 
D)  Hg 
E)  Ba 
A)  Ni 
B)  Cu 
C)  Sn 
D)  Hg 
E)  Ba

Question 8

An element consists of three isotopes.The abundance of one isotope is 92.21% and its atomic mass is 27.97693 u.The abundance of the second isotope is 4.70% and its atomic mass is 28.97649 u.The atomic mass of the third isotope is 29.97376 u.What is the atomic weight of the element?

Accepted Answer

A)  28.09 u 
B)  28.98 u 
C)  28.96 u 
D)  29.87 u 
E)  29.07 u 
A)  28.09 u 
B)  28.98 u 
C)  28.96 u 
D)  29.87 u 
E)  29.07 u

Question 9

How many bromide ions are in 0.55 g of iron(III)bromide?

Accepted Answer

A)  1.1 $\times$ 1021 ions 
B)  3.4 $\times$ 1021 ions 
C)  3.3 $\times$ 1023 ions 
D)  9.9 $\times$ 1023 ions 
E)  2.9 $\times$ 1026 ions 
A)  1.1 $\times$ 1021 ions 
B)  3.4 $\times$ 1021 ions 
C)  3.3 $\times$ 1023 ions 
D)  9.9 $\times$ 1023 ions 
E)  2.9 $\times$ 1026 ions

Question 10

What is the mass of 0.50 mol chromium(III)sulfide?

Accepted Answer

A)  2.5 $\times$ 10-3 g 
B)  5.9 $\times$ 10-3 g 
C)  42 g 
D)  1.0 $\times$ 102 g 
E)  110 g 
A)  2.5 $\times$ 10-3 g 
B)  5.9 $\times$ 10-3 g 
C)  42 g 
D)  1.0 $\times$ 102 g 
E)  110 g

Question 11

C2H2F4 is the formula for two possible molecules.C2H2F4 is an example of a(n)

Accepted Answer

A)  structural formula. 
B)  empirical formula. 
C)  condensed formula. 
D)  space-filling model. 
E)  molecular formula. 
A)  structural formula. 
B)  empirical formula. 
C)  condensed formula. 
D)  space-filling model. 
E)  molecular formula.

Question 12

The molar mass of platinum is 195.08 g/mol.What is the mass of 1.00 $\times$ 102 Pt atoms?

Accepted Answer

A)  8.51 $\times$ 10-25 g 
B)  3.24 $\times$ 10-24 g 
C)  1.67 $\times$ 10-22 g 
D)  3.24 $\times$ 10-22 g 
E)  3.24 $\times$ 10-20 g 
A)  8.51 $\times$ 10-25 g 
B)  3.24 $\times$ 10-24 g 
C)  1.67 $\times$ 10-22 g 
D)  3.24 $\times$ 10-22 g 
E)  3.24 $\times$ 10-20 g

Question 13

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

Accepted Answer

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

Question 14

A 1.583 g sample of an element contains 8.959 $\times$ 1021 atoms.What is the element symbol?

Accepted Answer

A)  Pd 
B)  Te 
C)  La 
D)  Sb 
E)  Rh 
A)  Pd 
B)  Te 
C)  La 
D)  Sb 
E)  Rh

Question 15

What is the mass number of an argon atom with 22 neutrons?

Accepted Answer

A)  2 
B)  18 
C)  22 
D)  40 
E)  39.95 
A)  2 
B)  18 
C)  22 
D)  40 
E)  39.95

Question 16

Sodium sulfate has the chemical formula Na2SO4.Based on this information,the formula for chromium(III)sulfate is ____.

Accepted Answer

A)  CrSO4 
B)  Cr(SO4)3 
C)  Cr2(SO4)3 
D)  Cr2SO4 
E)  Cr3(SO4)2 
A)  CrSO4 
B)  Cr(SO4)3 
C)  Cr2(SO4)3 
D)  Cr2SO4 
E)  Cr3(SO4)2

Question 17

Which of the following atoms contains the largest number of neutrons?

Accepted Answer

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

Question 18

Copper has an atomic weight of 63.55 u.If 69.17% of Cu exists as Cu-63 (62.93960 u),what is the identity and the atomic mass of the other isotope?

Accepted Answer

A)  Cu-64; 63.82 u 
B)  Cu-64; 64.16 u 
C)  Cu-65; 64.16 u 
D)  Cu-65; 64.92 u 
E)  Cu-66; 65.91 u 
A)  Cu-64; 63.82 u 
B)  Cu-64; 64.16 u 
C)  Cu-65; 64.16 u 
D)  Cu-65; 64.92 u 
E)  Cu-66; 65.91 u

Question 19

The elements in group 2A are known as the

Accepted Answer

A)  alkaline earth metals. 
B)  halogens. 
C)  transition metals. 
D)  alkali metals. 
E)  noble gases. 
A)  alkaline earth metals. 
B)  halogens. 
C)  transition metals. 
D)  alkali metals. 
E)  noble gases.

Question 20

What is the empirical formula of an oxide of nitrogen that contains 63.64 % nitrogen by mass?

Accepted Answer

A)  N2O3 
B)  NO 
C)  N2O5 
D)  NO2 
E)  N2O 
A)  N2O3 
B)  NO 
C)  N2O5 
D)  NO2 
E)  N2O

Exam 3: Atoms, molecules, and Ions

Atoms consist of three fundamental particles.What are these particles and their charges?

What mass of Al contains the same number of atoms as 3.0 g Pb?

What is the correct formula for an ionic compound that contains barium ions and carbonate ions?

What is the mass of chlorine-35 relative to carbon-12?

What is the common name of the group that has as one of its members the element which contains 4 protons in its nucleus?

William Crookes was this first to observe particles produced from a cathode ray tube.These particles eventually became known as ________.

An ionic compound has the formula MCl2.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

An element consists of three isotopes.The abundance of one isotope is 92.21% and its atomic mass is 27.97693 u.The abundance of the second isotope is 4.70% and its atomic mass is 28.97649 u.The atomic mass of the third isotope is 29.97376 u.What is the atomic weight of the element?

How many bromide ions are in 0.55 g of iron(III)bromide?

What is the mass of 0.50 mol chromium(III)sulfide?

C2H2F4 is the formula for two possible molecules.C2H2F4 is an example of a(n)

The molar mass of platinum is 195.08 g/mol.What is the mass of 1.00 ×\times× 102 Pt atoms?

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

A 1.583 g sample of an element contains 8.959 ×\times× 1021 atoms.What is the element symbol?

What is the mass number of an argon atom with 22 neutrons?

Sodium sulfate has the chemical formula Na2SO4.Based on this information,the formula for chromium(III)sulfate is ____.

Which of the following atoms contains the largest number of neutrons?

Copper has an atomic weight of 63.55 u.If 69.17% of Cu exists as Cu-63 (62.93960 u),what is the identity and the atomic mass of the other isotope?

The elements in group 2A are known as the

What is the empirical formula of an oxide of nitrogen that contains 63.64 % nitrogen by mass?

Basic Concepts of Chemistry

Mathlets 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 Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of 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

An ionic compound has the formula MCl₂.The mass of 0.3011 mol of the compound is 62.69 grams.What is the identity of the metal?

C₂H₂F₄ is the formula for two possible molecules.C₂H₂F₄ is an example of a(n)

The molar mass of platinum is 195.08 g/mol.What is the mass of 1.00 $\times$ 10² Pt atoms?

A 1.583 g sample of an element contains 8.959 $\times$ 10²¹ atoms.What is the element symbol?

Sodium sulfate has the chemical formula Na₂SO₄.Based on this information,the formula for chromium(III)sulfate is ____.