Question 1

How many SO32- ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

Accepted Answer

A)  1.52 × 1027 SO32- ions 
B)  4.76 × 1020 SO32- ions 
C)  2.10 × 1021 SO32- ions 
D)  1.05 × 1021 SO32- ions 
E)  9.52 × 1020 SO32- ions 
A)  1.52 × 1027 SO32- ions 
B)  4.76 × 1020 SO32- ions 
C)  2.10 × 1021 SO32- ions 
D)  1.05 × 1021 SO32- ions 
E)  9.52 × 1020 SO32- ions

Question 2

Identify a carboxylic acid.

Accepted Answer

A)  CH3CH2OCH2CH3 
B)  CH3CH2Cl 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH 
A)  CH3CH2OCH2CH3 
B)  CH3CH2Cl 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH

Question 3

The energy associated with formation of a crystalline structure from gaseous ions is know as the

Accepted Answer

A)  ionization energy. 
B)  lattice energy. 
C)  precipitation energy. 
D)  electron affinity. 
E)  potential energy. 
A)  ionization energy. 
B)  lattice energy. 
C)  precipitation energy. 
D)  electron affinity. 
E)  potential energy.

Question 4

Use Lewis theory to determine the chemical formula for the compound formed between Ca and I.

Accepted Answer

A)  Ca I 
B)  Ca2I3 
C)  Ca3I2 
D)  Ca I2 
E)  Ca2I 
A)  Ca I 
B)  Ca2I3 
C)  Ca3I2 
D)  Ca I2 
E)  Ca2I

Question 5

Use Lewis theory to determine the chemical formula for the compound formed between Mg and N.

Accepted Answer

A)  MgN 
B)  Mg3N2 
C)  MgN2 
D)  Mg2N 
E)  Mg2N3 
A)  MgN 
B)  Mg3N2 
C)  MgN2 
D)  Mg2N 
E)  Mg2N3

Question 6

Identify the compound with ionic bonds.

Accepted Answer

A)  Ne 
B)  CO 
C)  H2 
D)  H2O 
E)  KCl 
A)  Ne 
B)  CO 
C)  H2 
D)  H2O 
E)  KCl

Question 7

What is the empirical formula of a compound that is 48.6% C,8.2% H,and 43.2% O by mass?

Accepted Answer

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

Question 8

Determine the name for CoCl2∙6H2O.Remember that Co forms several ions.

Accepted Answer

A)  cobalt chloride hydrate 
B)  cobalt (I) chloride heptahydrate 
C)  cobalt (II) chloride heptahydrate 
D)  cobalt (II) chloride hexahydrate 
E)  cobalt (I) chloride 
A)  cobalt chloride hydrate 
B)  cobalt (I) chloride heptahydrate 
C)  cobalt (II) chloride heptahydrate 
D)  cobalt (II) chloride hexahydrate 
E)  cobalt (I) chloride

Question 9

Calculate the molar mass of Ba(C2O4)2.

Accepted Answer

A)  128.53 g/mol 
B)  328.01 g/mol 
C)  294.77 g/mol 
D)  225.34 g/mol 
E)  301.90 g/mol 
A)  128.53 g/mol 
B)  328.01 g/mol 
C)  294.77 g/mol 
D)  225.34 g/mol 
E)  301.90 g/mol

Question 10

Determine the name for P4O10.

Accepted Answer

A)  phosphorus (IV) oxide 
B)  diphosphorus pentoxide 
C)  phosphorus oxide 
D)  phosphorus (II) oxide 
E)  tetraphosphorus decoxide 
A)  phosphorus (IV) oxide 
B)  diphosphorus pentoxide 
C)  phosphorus oxide 
D)  phosphorus (II) oxide 
E)  tetraphosphorus decoxide

Question 11

How many moles of P I3 contain 2.55 × 1024 iodine atoms?

Accepted Answer

A)  1.41 moles P I3 
B)  4.23 moles P I3 
C)  12.7 moles P I3 
D)  7.87 moles P I3 
E)  2.82 moles P I3 
A)  1.41 moles P I3 
B)  4.23 moles P I3 
C)  12.7 moles P I3 
D)  7.87 moles P I3 
E)  2.82 moles P I3

Question 12

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Accepted Answer

A)  7.02 × 103 moles 
B)  1.42 × 10-4 moles 
C)  1.00 mole 
D)  1.21 moles 
E)  0.829 moles 
A)  7.02 × 103 moles 
B)  1.42 × 10-4 moles 
C)  1.00 mole 
D)  1.21 moles 
E)  0.829 moles

Question 13

Which of the following represent the Lewis structure for Cl?

Accepted Answer

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

Question 14

A triple 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 15

Give the name for H2SO4.

Accepted Answer

A)  sulfuric acid 
B)  persulfurous acid 
C)  sulfurous acid 
D)  hyposulfurous acid 
E)  persulfuric acid 
A)  sulfuric acid 
B)  persulfurous acid 
C)  sulfurous acid 
D)  hyposulfurous acid 
E)  persulfuric acid

Question 16

Calculate the mass percent composition of lithium in Li3PO4.

Accepted Answer

A)  26.75 % 
B)  17.98 % 
C)  30.72 % 
D)  55.27 % 
E)  20.82 % 
A)  26.75 % 
B)  17.98 % 
C)  30.72 % 
D)  55.27 % 
E)  20.82 %

Question 17

What is the chemical name for P2I4?

Accepted Answer

A)  phosphorous (IV) iodine 
B)  diphosphorous tetraiodine 
C)  phosphorous tetraiodine 
D)  phosphorous (II) iodine 
E)  diphosphorous iodine 
A)  phosphorous (IV) iodine 
B)  diphosphorous tetraiodine 
C)  phosphorous tetraiodine 
D)  phosphorous (II) iodine 
E)  diphosphorous iodine

Question 18

What is the chemical name for S2O?

Accepted Answer

A)  sulfur dioxide 
B)  sulfur oxide 
C)  disulfur oxide 
D)  disulfur monoxide 
E)  sulfur monoxide 
A)  sulfur dioxide 
B)  sulfur oxide 
C)  disulfur oxide 
D)  disulfur monoxide 
E)  sulfur monoxide

Question 19

What is the chemical formula for barium oxide?

Accepted Answer

A)  BaO 
B)  BaO2 
C)  Ba2O2 
D)  Ba2O 
E)  Ba2O3 
A)  BaO 
B)  BaO2 
C)  Ba2O2 
D)  Ba2O 
E)  Ba2O3

Question 20

Which of the compounds,K H ,N H3,C2H6,H F are ionic compounds?

Accepted Answer

A)  only C2H6 
B)  only K H  
C)  K H  and H F  
D)  N H3, C2H6, and H F  
A)  only C2H6 
B)  only K H  
C)  K H  and H F  
D)  N H3, C2H6, and H F

Exam 5: Molecules and Compounds

How many SO32- ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g/mol.

Identify a carboxylic acid.

The energy associated with formation of a crystalline structure from gaseous ions is know as the

Use Lewis theory to determine the chemical formula for the compound formed between Ca and I.

Use Lewis theory to determine the chemical formula for the compound formed between Mg and N.

Identify the compound with ionic bonds.

What is the empirical formula of a compound that is 48.6% C,8.2% H,and 43.2% O by mass?

Determine the name for CoCl2∙6H2O.Remember that Co forms several ions.

Calculate the molar mass of Ba(C2O4)2.

Determine the name for P4O10.

How many moles of P I3 contain 2.55 × 1024 iodine atoms?

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Which of the following represent the Lewis structure for Cl?

A triple covalent bond contains ________ of electrons.

Give the name for H2SO4.

Calculate the mass percent composition of lithium in Li3PO4.

What is the chemical name for P2I4?

What is the chemical name for S2O?

What is the chemical formula for barium oxide?

Which of the compounds,K H ,N H3,C2H6,H F are ionic compounds?

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

How many SO₃^2- ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃is 126.05 g/mol.

Determine the name for CoCl₂^∙6H₂O.Remember that Co forms several ions.

Calculate the molar mass of Ba(C₂O₄)₂.

Determine the name for P₄O₁₀.

How many moles of P I₃ contain 2.55 × 10²⁴ iodine atoms?

How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

Give the name for H₂SO₄.

Calculate the mass percent composition of lithium in Li₃PO₄.

What is the chemical name for P₂I₄?

What is the chemical name for S₂O?

Which of the compounds,KH,N H₃,C₂H₆,H Fare ionic compounds?