Question 1

Calculate the molar mass of Al(C2H3O2)3.

Accepted Answer

A)  86.03 g/mol 
B)  204.13 g/mol 
C)  56.00 g/mol 
D)  258.09 g/mol 
E)  139.99 g/mol 
A)  86.03 g/mol 
B)  204.13 g/mol 
C)  56.00 g/mol 
D)  258.09 g/mol 
E)  139.99 g/mol

Question 2

Which of the following is a molecular compound?

Accepted Answer

A)  LiCN 
B)  LiOH 
C)  Sr Br2 
D)  ZnS 
E)  P4O10 
A)  LiCN 
B)  LiOH 
C)  Sr Br2 
D)  ZnS 
E)  P4O10

Question 3

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590
Ca⁺(g)→ Ca2⁺(g)+ e⁻ 1010
2 O(g)→ O2(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O2⁻(g)878
Ca(s)+   O2(g)→ CaO(s)-635

Accepted Answer

A)  -3414 kJ 
B)  +1397 kJ 
C)  -2667 kJ 
D)  +3028 kJ 
E)  -2144 kJ 
A)  -3414 kJ 
B)  +1397 kJ 
C)  -2667 kJ 
D)  +3028 kJ 
E)  -2144 kJ

Question 4

Use the data given below to construct a Born-Haber cycle to determine the second ionization energy of Ca. DH°(kJ)
Ca(s)→ Ca(g)193
Ca(g)→ Ca⁺(g)+ e⁻ 590.
2 O(g)→ O2(g)-498
O(g)+ e⁻ → O⁻(g)-141
O⁻(g)+ e⁻ → O2⁻(g)878
Ca(s)+   O2(g)→ CaO(s)-635
Ca2⁺(g)+ O2⁻(g)→ CaO(s)-3414

Accepted Answer

A)  1010 kJ 
B)  1757 kJ 
C)  1508 kJ 
D)  -3027 kJ 
E)  -1514 kJ 
A)  1010 kJ 
B)  1757 kJ 
C)  1508 kJ 
D)  -3027 kJ 
E)  -1514 kJ

Question 5

Which of the following has the smallest mass?

Accepted Answer

A)  1.40 × 1024 molecules of I2 
B)  340. g of Cl2 
C)  10.0 mol of F2 
D)  0. 200 kg of Br2 
A)  1.40 × 1024 molecules of I2 
B)  340. g of Cl2 
C)  10.0 mol of F2 
D)  0. 200 kg of Br2

Question 6

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Accepted Answer

A)  Al3O2 
B)  Al2O3 
C)  AlO2 
D)  Al2O 
E)  AlO 
A)  Al3O2 
B)  Al2O3 
C)  AlO2 
D)  Al2O 
E)  AlO

Question 7

Give the correct formula for aluminum sulfate.

Accepted Answer

A)  Al2SO4 
B)  Al(SO4)3 
C)  Al3(SO4)2 
D)  Al2(SO4)3 
A)  Al2SO4 
B)  Al(SO4)3 
C)  Al3(SO4)2 
D)  Al2(SO4)3

Question 8

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O.What is the empirical formula for the compound?

Accepted Answer

A)  C5H2O 
B)  CHO 
C)  C3H6O 
D)  C3H7O 
E)  C6HO3 
A)  C5H2O 
B)  CHO 
C)  C3H6O 
D)  C3H7O 
E)  C6HO3

Question 9

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

Accepted Answer

A)  CsF 
B)  CsCl 
C)  CsBr 
D)  CsI 
A)  CsF 
B)  CsCl 
C)  CsBr 
D)  CsI

Question 10

What is the empirical formula for a compound that undergoes combustion analysis and produces 12.32g of CO2 and 6.71g of H2O?

Accepted Answer

A)  C3H4 
B)  C4H7 
C)  C3H8 
D)  CH4 
E)  C2H3 
A)  C3H4 
B)  C4H7 
C)  C3H8 
D)  CH4 
E)  C2H3

Question 11

Which of the following is the correct chemical formula for a molecule of fluorine?

Accepted Answer

A)  F 
B)  F- 
C)  F+ 
D)  F2 
A)  F 
B)  F- 
C)  F+ 
D)  F2

Question 12

How many moles of P Cl3 contain 3.68 × 1025 chlorine atoms?

Accepted Answer

A)  61.1 moles P Cl3 
B)  20.4 moles P Cl3 
C)  16.4 moles P Cl3 
D)  54.5 moles P Cl3 
E)  49.1 moles P Cl3 
A)  61.1 moles P Cl3 
B)  20.4 moles P Cl3 
C)  16.4 moles P Cl3 
D)  54.5 moles P Cl3 
E)  49.1 moles P Cl3

Question 13

What is the empirical formula for a compound that is composed of 62.04% carbon.27.55% oxygen,and 10.41% hydrogen?

Accepted Answer

A)  CHO 
B)  C4H9O2 
C)  C2H4O3 
D)  CH2O2 
E)  C3H6O 
A)  CHO 
B)  C4H9O2 
C)  C2H4O3 
D)  CH2O2 
E)  C3H6O

Question 14

Determine the molecular formula for a compound that is 70.79% carbon,8.91% hydrogen,4.59% nitrogen,and 15.72% oxygen.

Accepted Answer

A)  C18H27NO3 
B)  C18H27NO2 
C)  C17H27NO3 
D)  C17H26NO3 
A)  C18H27NO3 
B)  C18H27NO2 
C)  C17H27NO3 
D)  C17H26NO3

Question 15

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

Accepted Answer

A)  28.12 % 
B)  9.372 % 
C)  42.73 % 
D)  21.38 % 
E)  35.97 % 
A)  28.12 % 
B)  9.372 % 
C)  42.73 % 
D)  21.38 % 
E)  35.97 %

Question 16

Dioxybenzone is a compound found in sunscreen,and only contains carbon,oxygen,and hydrogen.Analysis of the compound found that it contains 4.92% hydrogen and 26.18% oxygen.The molar mass of the compound is 244.25 g/mol.What is the molecular formula?

Accepted Answer

A)  C12H10O3 
B)  C10H8O4 
C)  C8H11O5 
D)  C14H12O4 
E)  C16H10O6 
A)  C12H10O3 
B)  C10H8O4 
C)  C8H11O5 
D)  C14H12O4 
E)  C16H10O6

Question 17

Calculate the molar mass of Ca3(PO4)2.

Accepted Answer

A)  87.05 g/mol 
B)  215.21 g/mol 
C)  310.18 g/mol 
D)  279.21 g/mol 
E)  246.18 g/mol 
A)  87.05 g/mol 
B)  215.21 g/mol 
C)  310.18 g/mol 
D)  279.21 g/mol 
E)  246.18 g/mol

Question 18

What type of bonding is found in the compound H Cl ?

Accepted Answer

A)  covalent bonding 
B)  hydrogen bonding 
C)  ionic bonding 
D)  metallic bonding 
A)  covalent bonding 
B)  hydrogen bonding 
C)  ionic bonding 
D)  metallic bonding

Question 19

Give the name for SnO.

Accepted Answer

A)  tin (I) oxide 
B)  tin (II) oxide 
C)  tin (III) oxide 
D)  tin (IV) oxide 
A)  tin (I) oxide 
B)  tin (II) oxide 
C)  tin (III) oxide 
D)  tin (IV) oxide

Question 20

Give the structure for lithium chlorate.

Accepted Answer

A)  LiClO 
B)  LiClO2 
C)  LiClO3 
D)  LiClO4 
A)  LiClO 
B)  LiClO2 
C)  LiClO3 
D)  LiClO4

Exam 5: Molecules and Compounds

Calculate the molar mass of Al(C2H3O2)3.

Which of the following is a molecular compound?

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ) Ca(s)→ Ca(g)193 Ca(g)→ Ca⁺(g)+ e⁻ 590 Ca⁺(g)→ Ca2⁺(g)+ e⁻ 1010 2 O(g)→ O2(g)-498 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O2⁻(g)878 Ca(s)+ O2(g)→ CaO(s)-635

Which of the following has the smallest mass?

Use Lewis theory to determine the chemical formula for the compound formed between Al and O.

Give the correct formula for aluminum sulfate.

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O.What is the empirical formula for the compound?

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

What is the empirical formula for a compound that undergoes combustion analysis and produces 12.32g of CO2 and 6.71g of H2O?

Which of the following is the correct chemical formula for a molecule of fluorine?

How many moles of P Cl3 contain 3.68 × 1025 chlorine atoms?

What is the empirical formula for a compound that is composed of 62.04% carbon.27.55% oxygen,and 10.41% hydrogen?

Determine the molecular formula for a compound that is 70.79% carbon,8.91% hydrogen,4.59% nitrogen,and 15.72% oxygen.

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

Dioxybenzone is a compound found in sunscreen,and only contains carbon,oxygen,and hydrogen.Analysis of the compound found that it contains 4.92% hydrogen and 26.18% oxygen.The molar mass of the compound is 244.25 g/mol.What is the molecular formula?

Calculate the molar mass of Ca3(PO4)2.

What type of bonding is found in the compound H Cl ?

Give the name for SnO.

Give the structure for lithium chlorate.

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

Calculate the molar mass of Al(C₂H₃O₂)₃.

Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ) Ca(s)→ Ca(g)193 Ca(g)→ Ca⁺(g)+ e⁻ 590 Ca⁺(g)→ Ca²⁺(g)+ e⁻ 1010 2 O(g)→ O₂(g)-498 O(g)+ e⁻ → O⁻(g)-141 O⁻(g)+ e⁻ → O²⁻(g)878 Ca(s)+ O₂(g)→ CaO(s)-635

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO₂ and 59.38 mg of H₂O.What is the empirical formula for the compound?

What is the empirical formula for a compound that undergoes combustion analysis and produces 12.32g of CO₂ and 6.71g of H₂O?

How many moles of P Cl₃ contain 3.68 × 10²⁵ chlorine atoms?

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

Calculate the molar mass of Ca₃(PO₄)₂.

What type of bonding is found in the compound H Cl?