Question 1

Which one of the following contains 35% carbon by mass?

Accepted Answer

A)  C2H2 
B)  CH4 
C)  CH3F  
D)  CO2 
A)  C2H2 
B)  CH4 
C)  CH3F  
D)  CO2

Question 2

The solid compound,Na4SiO4,contains

Accepted Answer

A)  Na+, Si4+, and O2- ions. 
B)  Na+ and SiO4 -4 ions. 
C)  Na4+ and SiO4 -4 ions. 
D)  Na4SiO4 molecules. 
A)  Na+, Si4+, and O2- ions. 
B)  Na+ and SiO4 -4 ions. 
C)  Na4+ and SiO4 -4 ions. 
D)  Na4SiO4 molecules.

Question 3

Which of the following exists as a diatomic molecule?

Accepted Answer

A)  hydrogen 
B)  carbon 
C)  phosphorus 
D)  calcium 
E)  xenon 
A)  hydrogen 
B)  carbon 
C)  phosphorus 
D)  calcium 
E)  xenon

Question 4

Give the name for NaHSO3.

Accepted Answer

A)  sodium sulfite 
B)  sodium sulfate 
C)  sodium hydrogen sulfate 
D)  sodium hydrogen sulfite 
E)  sodium sulfide 
A)  sodium sulfite 
B)  sodium sulfate 
C)  sodium hydrogen sulfate 
D)  sodium hydrogen sulfite 
E)  sodium sulfide

Question 5

Which of the following compounds is ethanol?

Accepted Answer

A)  C2H6 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3OCH3 
A)  C2H6 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3OCH3

Question 6

A single 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 7

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 2.277 g of CO2 and 1.161 g of H2O.What is the empirical formula of the compound?

Accepted Answer

A)  CH2 
B)  C2H5 
C)  C4H10 
D)  C5H2 
A)  CH2 
B)  C2H5 
C)  C4H10 
D)  C5H2

Question 8

Determine the name for H2CO3.

Accepted Answer

A)  carbonous acid 
B)  dihydrogen carbonate 
C)  carbonic acid 
D)  hydrocarbonic acid 
E)  hydrocarbide acid 
A)  carbonous acid 
B)  dihydrogen carbonate 
C)  carbonic acid 
D)  hydrocarbonic acid 
E)  hydrocarbide acid

Question 9

What is the chemical formula for copper( II)phosphate?

Accepted Answer

A)  Cu2P 
B)  Cu2PO4 
C)  Cu3P2 
D)  Cu3( PO4)2 
A)  Cu2P 
B)  Cu2PO4 
C)  Cu3P2 
D)  Cu3( PO4)2

Question 10

Identify the compound with covalent bonds.

Accepted Answer

A)  CH4 
B)  Kr 
C)  KBr 
D)  K 
E)  NaCl 
A)  CH4 
B)  Kr 
C)  KBr 
D)  K 
E)  NaCl

Question 11

What is the chemical formula for magnesium hydroxide?

Accepted Answer

A)  MgH2 
B)  MgOH 
C)  MgOH2 
D)  Mg(OH)2 
A)  MgH2 
B)  MgOH 
C)  MgOH2 
D)  Mg(OH)2

Question 12

Which of the following statements is TRUE?

Accepted Answer

A)  An ionic bond is much stronger than most covalent bonds. 
B)  An ionic bond is formed through the sharing of electrons. 
C)  Ionic compounds at room temperature typically conduct electricity. 
D)  Once dissolved in water, ionic compounds rarely conduct electricity. 
E)  None of the above are true. 
A)  An ionic bond is much stronger than most covalent bonds. 
B)  An ionic bond is formed through the sharing of electrons. 
C)  Ionic compounds at room temperature typically conduct electricity. 
D)  Once dissolved in water, ionic compounds rarely conduct electricity. 
E)  None of the above are true.

Question 13

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ)
K(s)→ K(g)89
K(g)→ K⁺(g)+ e⁻ 419
Br2(l)→ 2 Br(g)193
K(s)+   Br2(g)→ KBr(s)-394
KBr(s)→ K⁺(g)+ Br⁻(g)674

Accepted Answer

A)  -885 kJ 
B)  -325 kJ 
C)  +367 kJ 
D)  -464 kJ 
E)  +246 kJ 
A)  -885 kJ 
B)  -325 kJ 
C)  +367 kJ 
D)  -464 kJ 
E)  +246 kJ

Question 14

What is the molar mass of chlorine gas?

Accepted Answer

A)  35.5 g/mol 
B)  70.9 g/mol 
C)  6.02 × 1023 g/mol 
D)  1.20 × 1023 g/mol 
A)  35.5 g/mol 
B)  70.9 g/mol 
C)  6.02 × 1023 g/mol 
D)  1.20 × 1023 g/mol

Question 15

Determine the name for F2O.

Accepted Answer

A)  fluorine oxide 
B)  di fluorine monoxide 
C)  fluorine (I) oxide 
D)  fluorine (II) oxide 
E)  fluorate 
A)  fluorine oxide 
B)  di fluorine monoxide 
C)  fluorine (I) oxide 
D)  fluorine (II) oxide 
E)  fluorate

Question 16

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.

Accepted Answer

A)  1.23 × 1023 C atoms 
B)  2.96 × 1024 C atoms 
C)  2.87 × 1025 C atoms 
D)  1.10 × 1024 C atoms 
E)  3.68 × 1023 C atoms 
A)  1.23 × 1023 C atoms 
B)  2.96 × 1024 C atoms 
C)  2.87 × 1025 C atoms 
D)  1.10 × 1024 C atoms 
E)  3.68 × 1023 C atoms

Question 17

Which of the following reactions is associated with the lattice energy of Li2O (ΔH°latt)?

Accepted Answer

A)  Li2O(s) → 2 Li⁺(g) + O2⁻(g) 
B)  2 Li⁺(aq) + O2⁻(aq) → Li2O(s) 
C)  2 Li⁺(g) + O2⁻(g) → Li2O(s) 
D)  Li2O(s) → 2 Li⁺(aq) + O2⁻(aq) 
E)  2 Li(s) +   O2(g) → Li2O(s) 
A)  Li2O(s) → 2 Li⁺(g) + O2⁻(g) 
B)  2 Li⁺(aq) + O2⁻(aq) → Li2O(s) 
C)  2 Li⁺(g) + O2⁻(g) → Li2O(s) 
D)  Li2O(s) → 2 Li⁺(aq) + O2⁻(aq) 
E)  2 Li(s) +   O2(g) → Li2O(s)

Question 18

Calculate the molar mass for Mg(ClO4)2.

Accepted Answer

A)  223.21 g/mol 
B)  123.76 g/mol 
C)  119.52 g/mol 
D)  247.52 g/mol 
E)  75.76 g/mol 
A)  223.21 g/mol 
B)  123.76 g/mol 
C)  119.52 g/mol 
D)  247.52 g/mol 
E)  75.76 g/mol

Question 19

What is the formula for zinc chloride?

Accepted Answer

A)  ZnC 
B)  Zn2Cl2 
C)  ZnCl2 
D)  Zn2Cl 
E)  ZnCl3 
A)  ZnC 
B)  Zn2Cl2 
C)  ZnCl2 
D)  Zn2Cl 
E)  ZnCl3

Question 20

How many moles are there in 4.00 g of ethanol,CH3CH2OH?

Accepted Answer

A)  0. 00543 mol 
B)  0. 0870 mol 
C)  11.5 mol 
D)  184 mol 
A)  0. 00543 mol 
B)  0. 0870 mol 
C)  11.5 mol 
D)  184 mol

Exam 5: Molecules and Compounds

Which one of the following contains 35% carbon by mass?

The solid compound,Na4SiO4,contains

Which of the following exists as a diatomic molecule?

Give the name for NaHSO3.

Which of the following compounds is ethanol?

A single covalent bond contains ________ of electrons.

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 2.277 g of CO2 and 1.161 g of H2O.What is the empirical formula of the compound?

Determine the name for H2CO3.

What is the chemical formula for copper( II)phosphate?

Identify the compound with covalent bonds.

What is the chemical formula for magnesium hydroxide?

Which of the following statements is TRUE?

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ) K(s)→ K(g)89 K(g)→ K⁺(g)+ e⁻ 419 Br2(l)→ 2 Br(g)193 K(s)+ Br2(g)→ KBr(s)-394 KBr(s)→ K⁺(g)+ Br⁻(g)674

What is the molar mass of chlorine gas?

Determine the name for F2O.

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.

Which of the following reactions is associated with the lattice energy of Li2O (ΔH°latt)?

Calculate the molar mass for Mg(ClO4)2.

What is the formula for zinc chloride?

How many moles are there in 4.00 g of ethanol,CH3CH2OH?

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

The solid compound,Na₄SiO₄,contains

Give the name for NaHSO₃.

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 2.277 g of CO₂ and 1.161 g of H₂O.What is the empirical formula of the compound?

Determine the name for H₂CO₃.

Use the data given below to construct a Born-Haber cycle to determine the electron affinity of Br. DH°(kJ) K(s)→ K(g)89 K(g)→ K⁺(g)+ e⁻ 419 Br₂(l)→ 2 Br(g)193 K(s)+ Br₂(g)→ KBr(s)-394 KBr(s)→ K⁺(g)+ Br⁻(g)674

Determine the name for F₂O.

How many atoms of carbon are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃is 233.99 g/mol.

Which of the following reactions is associated with the lattice energy of Li₂O (ΔH°_latt)?

Calculate the molar mass for Mg(ClO₄)₂.

How many moles are there in 4.00 g of ethanol,CH₃CH₂OH?