Question 1

What is the charge on the Fe ions in Fe2O3?

Accepted Answer

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

Question 2

Describe the difference between a molecular formula and an empirical formula.Give an example.

Accepted Answer

A molecular formula is the exact number

Question 3

How many moles of C6H8 contain 4.95 × 1024 hydrogen atoms?

Accepted Answer

A)  8.22 moles C6H8 
B)  6.58 moles C6H8 
C)  1.03 moles C6H8 
D)  9.73 moles C6H8 
E)  3.09 moles C6H8 
A)  8.22 moles C6H8 
B)  6.58 moles C6H8 
C)  1.03 moles C6H8 
D)  9.73 moles C6H8 
E)  3.09 moles C6H8

Question 4

Determine the name for TiCO3.Remember that titanium forms several ions.

Accepted Answer

A)  titanium (II) carbonate 
B)  titanium carbide 
C)  titanium carbonite 
D)  titanium (II) carbonite 
E)  titanium (I) carbonate 
A)  titanium (II) carbonate 
B)  titanium carbide 
C)  titanium carbonite 
D)  titanium (II) carbonite 
E)  titanium (I) carbonate

Question 5

Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Accepted Answer

The Mg²⁺ and Na⁺ ion are similar in size

Question 6

Identify an amine.

Accepted Answer

A)  CH3CH2SCH2CH3 
B)  CH3CH2Cl 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH 
A)  CH3CH2SCH2CH3 
B)  CH3CH2Cl 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH

Question 7

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 30.0 g of calcium fluoride?

Accepted Answer

A)  1.71 g 
B)  7.70 g 
C)  15.0 g 
D)  15.4 g 
A)  1.71 g 
B)  7.70 g 
C)  15.0 g 
D)  15.4 g

Question 8

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

Accepted Answer

A)  RbBr > NaF > KCl 
B)  NaF > KCl > RbBr 
C)  KCl > NaF > RbBr 
D)  NaF > RbBr > KCl 
E)  RbBr > KCl > NaF 
A)  RbBr > NaF > KCl 
B)  NaF > KCl > RbBr 
C)  KCl > NaF > RbBr 
D)  NaF > RbBr > KCl 
E)  RbBr > KCl > NaF

Question 9

A double covalent bond contains ________ of electrons.

Accepted Answer

A)  0 pairs 
B)  1 pair 
C)  2 pairs 
D)  3 pairs 
E)  4 pairs 
A)  0 pairs 
B)  1 pair 
C)  2 pairs 
D)  3 pairs 
E)  4 pairs

Question 10

In which set do all elements tend to form cations in binary ionic compounds?

Accepted Answer

A)  Na, Al, S 
B)  Ca, Mn, Sn 
C)  P, As, Sb 
D)  S, Cl, Br 
A)  Na, Al, S 
B)  Ca, Mn, Sn 
C)  P, As, Sb 
D)  S, Cl, Br

Question 11

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Accepted Answer

A)  NO 
B)  N2O 
C)  NO2 
D)  N2O3 
E)  NO3 
A)  NO 
B)  N2O 
C)  NO2 
D)  N2O3 
E)  NO3

Question 12

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Accepted Answer

A)  Li2O > K2O > Rb2S 
B)  Li2O > Rb2S > K2O 
C)  Rb2S > K2O > Li2O 
D)  Rb2S > Li2O > K2O 
E)  K2O > Li2O > Rb2S 
A)  Li2O > K2O > Rb2S 
B)  Li2O > Rb2S > K2O 
C)  Rb2S > K2O > Li2O 
D)  Rb2S > Li2O > K2O 
E)  K2O > Li2O > Rb2S

Question 13

A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO2 and 70.44 grams of H2O.What is the empirical formula of the alcohol?

Accepted Answer

Question 14

Which of the following is a molecular compound?

Accepted Answer

A)  Cu F2 
B)  P2O4 
C)  NaNO3 
D)  SrSO3 
E)  Rb F 
A)  Cu F2 
B)  P2O4 
C)  NaNO3 
D)  SrSO3 
E)  Rb F

Question 15

The compound,Cu( N O3)2,is named

Accepted Answer

A)  copper nitrate(II). 
B)  copper(I) nitrate. 
C)  copper(I) nitrate(II). 
D)  copper(II) nitrate. 
A)  copper nitrate(II). 
B)  copper(I) nitrate. 
C)  copper(I) nitrate(II). 
D)  copper(II) nitrate.

Question 16

Identify an ionic bond.

Accepted Answer

A)  Neutrons are pooled. 
B)  Electrons are shared. 
C)  Electrons are transferred. 
D)  Protons are gained. 
E)  Protons are lost. 
A)  Neutrons are pooled. 
B)  Electrons are shared. 
C)  Electrons are transferred. 
D)  Protons are gained. 
E)  Protons are lost.

Question 17

Calculate the mass percent composition of oxygen in Al2(SO4)3.

Accepted Answer

Question 18

Which of the following ionic compounds would be expected to have the highest lattice energy?

Accepted Answer

A)  Li Br 
B)  Na Br 
C)  K Br 
D)  Rb Br 
A)  Li Br 
B)  Na Br 
C)  K Br 
D)  Rb Br

Question 19

Calculate the molar mass of H2CO3.

Accepted Answer

A)  62.03 g/mol 
B)  29.02 g/mol 
C)  61.02 g/mol 
D)  60.01 g/mol 
E)  74.04 g/mol 
A)  62.03 g/mol 
B)  29.02 g/mol 
C)  61.02 g/mol 
D)  60.01 g/mol 
E)  74.04 g/mol

Question 20

The ion,AsO33-,is named

Accepted Answer

A)  arsenate ion. 
B)  arsenite ion. 
C)  arsenic dioxide ion. 
D)  arsenic(II) oxide ion. 
A)  arsenate ion. 
B)  arsenite ion. 
C)  arsenic dioxide ion. 
D)  arsenic(II) oxide ion.

Exam 5: Molecules and Compounds

What is the charge on the Fe ions in Fe2O3?

Describe the difference between a molecular formula and an empirical formula.Give an example.

How many moles of C6H8 contain 4.95 × 1024 hydrogen atoms?

Determine the name for TiCO3.Remember that titanium forms several ions.

Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Identify an amine.

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 30.0 g of calcium fluoride?

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

A double covalent bond contains ________ of electrons.

In which set do all elements tend to form cations in binary ionic compounds?

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO2 and 70.44 grams of H2O.What is the empirical formula of the alcohol?

Which of the following is a molecular compound?

The compound,Cu( N O3)2,is named

Identify an ionic bond.

Calculate the mass percent composition of oxygen in Al2(SO4)3.

Which of the following ionic compounds would be expected to have the highest lattice energy?

Calculate the molar mass of H2CO3.

The ion,AsO33-,is named

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

What is the charge on the Fe ions in Fe₂O₃?

How many moles of C₆H₈ contain 4.95 × 10²⁴ hydrogen atoms?

Determine the name for TiCO₃.Remember that titanium forms several ions.

Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO₂ and 70.44 grams of H₂O.What is the empirical formula of the alcohol?

The compound,Cu( N O₃)₂,is named

Calculate the mass percent composition of oxygen in Al₂(SO₄)₃.

Calculate the molar mass of H₂CO₃.

The ion,AsO₃^3-,is named