Question 1

Which one of the following ionic solids would have the largest lattice energy?

Accepted Answer

A) NaCl 
B) NaF 
C) CaBr2 
D) CsI 
E) CaCl2 
A) NaCl 
B) NaF 
C) CaBr2 
D) CsI 
E) CaCl2

Question 2

The Lewis dot symbol for the a lead atom is

Accepted Answer

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

Question 3

Write a Lewis structure for OF2.

Accepted Answer

Question 4

Write a Lewis structure for the chlorate ion, ClO3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 5

The Lewis dot symbol for the chloride ion is

Accepted Answer

A)    
B)    - 
C)    - 
D)    - 
E) Cl- 
A)    
B)    - 
C)    - 
D)    - 
E) Cl-

Question 6

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

Accepted Answer

A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4) 
A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4)

Question 7

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol
BE(C=O in CO2)= 799 kJ/mol
BE(C-H)= 414 kJ/mol
BE(O-H)= 460 kJ/mol
BE(O=O)= 498.7 kJ/mol

Accepted Answer

A) 1360 kJ 
B) 2240 kJ 
C) 2370 kJ 
D) 1540 kJ 
E) 1970 kJ 
A) 1360 kJ 
B) 2240 kJ 
C) 2370 kJ 
D) 1540 kJ 
E) 1970 kJ

Question 8

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 9

The electron dot formula for O2 shows

Accepted Answer

A) a single covalent bond. 
B) a double covalent bond. 
C) an ionic bond. 
D) a total of 8 x 2 = 16 electron dots. 
E) a total of 32 electron dots. 
A) a single covalent bond. 
B) a double covalent bond. 
C) an ionic bond. 
D) a total of 8 x 2 = 16 electron dots. 
E) a total of 32 electron dots.

Question 10

The formal charge on the bromine atom in BrO3-  drawn with three single bonds is

Accepted Answer

A) -2. 
B) -1. 
C) 0. 
D) +1. 
E) +2. 
A) -2. 
B) -1. 
C) 0. 
D) +1. 
E) +2.

Question 11

Use the bond enthalpy data given to estimate the heat released when 25.0 g of acetylene gas, C2H2, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol
BE(C$\equiv$C)= 812 kJ/mol
BE(C=O in CO2)= 799 kJ/mol
BE(C-H)= 414 kJ/mol
BE(O-H)= 460 kJ/mol
BE(O=O)= 498.7 kJ/mol

Accepted Answer

A) 1180 kJ 
B) 447 kJ 
C) 364 kJ 
D) 1230 kJ 
E) 16.8 kJ 
A) 1180 kJ 
B) 447 kJ 
C) 364 kJ 
D) 1230 kJ 
E) 16.8 kJ

Question 12

Of the following substances, KCl, KBr, and KF, KF will have the highest melting point.

Accepted Answer

A) True 
 B)False

Question 13

Consider the hypothetical element Y with electron-dot formula   Give the formula for the simplest compound this element forms with chlorine.

Accepted Answer

The answer of Consider the hypothetical element Y with electron-dot...

Question 14

The number of lone electron pairs in the CO32- ion is ___.

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 8 
A) 4 
B) 5 
C) 6 
D) 7 
E) 8

Question 15

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Accepted Answer

KCl(s)@#LAT-DLM& K<s

Question 16

The polarity of covalent bonds increases as the percent ionic character increases.

Accepted Answer

A) True 
 B)False

Question 17

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Accepted Answer

A) +2. 
B) +1. 
C) 0. 
D) -1. 
E) -2. 
A) +2. 
B) +1. 
C) 0. 
D) -1. 
E) -2.

Question 18

Complete this statement: Coulomb's law states that the magnitude of the force of interaction between two charged bodies is

Accepted Answer

A) directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them. 
B) directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
C) inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them. 
D) directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
A) directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them. 
B) directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them. 
C) inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them. 
D) directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them.

Question 19

Which molecule has a Lewis structure that does not obey the octet rule?

Accepted Answer

A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2 
A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2

Question 20

Each of the three resonance structures of NO3- has how many lone pairs of electrons?

Accepted Answer

A) 7 
B) 8 
C) 9 
D) 10 
E) 13 
A) 7 
B) 8 
C) 9 
D) 10 
E) 13

Exam 9: Chemical Bonding I: the Covalent Bond

Which one of the following ionic solids would have the largest lattice energy?

The Lewis dot symbol for the a lead atom is

Write a Lewis structure for OF2.

Write a Lewis structure for the chlorate ion, ClO3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

The Lewis dot symbol for the chloride ion is

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol BE(C=O in CO2)= 799 kJ/mol BE(C-H)= 414 kJ/mol BE(O-H)= 460 kJ/mol BE(O=O)= 498.7 kJ/mol

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

The electron dot formula for O2 shows

The formal charge on the bromine atom in BrO3- drawn with three single bonds is

Of the following substances, KCl, KBr, and KF, KF will have the highest melting point.

Consider the hypothetical element Y with electron-dot formula Give the formula for the simplest compound this element forms with chlorine.

The number of lone electron pairs in the CO32- ion is ___.

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

The polarity of covalent bonds increases as the percent ionic character increases.

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Complete this statement: Coulomb's law states that the magnitude of the force of interaction between two charged bodies is

Which molecule has a Lewis structure that does not obey the octet rule?

Each of the three resonance structures of NO3- has how many lone pairs of electrons?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Write a Lewis structure for OF₂.

Write a Lewis structure for the chlorate ion, ClO₃^-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Which response includes all the molecules below that do not follow the octet rule? (1)H₂S (2)BCl₃ (3)PH₃ (4)SF₄

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C₃H₈, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol BE(C=O in CO₂)= 799 kJ/mol BE(C-H)= 414 kJ/mol BE(O-H)= 460 kJ/mol BE(O=O)= 498.7 kJ/mol

Write a Lewis structure for the phosphate ion, PO₄^3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

The electron dot formula for O₂ shows

The formal charge on the bromine atom in BrO₃^- drawn with three single bonds is

The number of lone electron pairs in the CO₃^2- ion is ___.

In the Lewis structure of the iodate ion, IO₃^-, that satisfies the octet rule, the formal charge on the central iodine atom is

Each of the three resonance structures of NO₃^-has how many lone pairs of electrons?