Question 1

The compound, (NH4)2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Accepted Answer

A)  ammonium sulfide 
B)  diammonium sulfide 
C)  ammonium sulfite 
D)  ammonia(I) sulfite 
E)  ammonium(I) sulfide 
A)  ammonium sulfide 
B)  diammonium sulfide 
C)  ammonium sulfite 
D)  ammonia(I) sulfite 
E)  ammonium(I) sulfide

Question 2

The compound, P4S10, is used in the manufacture of safety matches. What is its name?

Accepted Answer

A)  phosphorus sulfide 
B)  phosphoric sulfide 
C)  phosphorus decasulfide 
D)  tetraphosphorus decasulfide 
E)  phosphorus pentasulfide 
A)  phosphorus sulfide 
B)  phosphoric sulfide 
C)  phosphorus decasulfide 
D)  tetraphosphorus decasulfide 
E)  phosphorus pentasulfide

Question 3

Which one of the following formulas of ionic compounds is the least likely to be correct?

Accepted Answer

A)  NH4Cl 
B)  Ba(OH)2 
C)  Na2SO4 
D)  Ca2NO3 
E)  Cu(CN)2 
A)  NH4Cl 
B)  Ba(OH)2 
C)  Na2SO4 
D)  Ca2NO3 
E)  Cu(CN)2

Question 4

Which one of the following is a polyatomic cation?

Accepted Answer

A)  nitrate 
B)  chromate 
C)  permanganate 
D)  hydronium 
E)  potassium 
A)  nitrate 
B)  chromate 
C)  permanganate 
D)  hydronium 
E)  potassium

Question 5

What is the name of the acid formed when HCN gas is dissolved in water?

Accepted Answer

A)  cyanic acid 
B)  hydrocyanic acid 
C)  cyanous acid 
D)  hydrocyanous acid 
E)  hydrogen cyanide 
A)  cyanic acid 
B)  hydrocyanic acid 
C)  cyanous acid 
D)  hydrocyanous acid 
E)  hydrogen cyanide

Question 6

In the ionic compound with the general formula M2 X3, the likely charge on X is

Accepted Answer

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

Question 7

Which of the following compounds is ionic?

Accepted Answer

A)  PF3 
B)  CS2 
C)  HCl 
D)  SO2 
E)  MgCl2 
A)  PF3 
B)  CS2 
C)  HCl 
D)  SO2 
E)  MgCl2

Question 8

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford 
A)  Dalton 
B)  Gay-Lussac 
C)  Thomson 
D)  Millikan 
E)  Rutherford

Question 9

Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.

Accepted Answer

A)  653.52 amu 
B)  259.89 amu 
C)  221.90 amu 
D)  202.90 amu 
E)  145.90 amu 
A)  653.52 amu 
B)  259.89 amu 
C)  221.90 amu 
D)  202.90 amu 
E)  145.90 amu

Question 10

Lead (Pb) is a main-group element.

Accepted Answer

A) True 
 B)False

Question 11

The formula of heptane is

Accepted Answer

A)  C6H12. 
B)  C6H14. 
C)  C7H14. 
D)  C7H16. 
E)  C8H16. 
A)  C6H12. 
B)  C6H14. 
C)  C7H14. 
D)  C7H16. 
E)  C8H16.

Question 12

When an alkali metal combines with a non-metal, a covalent bond is normally formed.

Accepted Answer

A) True 
 B)False

Question 13

Which one of the following combinations of names and formulas of ions is incorrect?

Accepted Answer

A)  NH4+ ammonium 
B)  S2- sulfide 
C)  CN- cyanide 
D)  S2O32- thiosulfate 
E)  ClO3- perchlorate 
A)  NH4+ ammonium 
B)  S2- sulfide 
C)  CN- cyanide 
D)  S2O32- thiosulfate 
E)  ClO3- perchlorate

Question 14

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A)  the small size of the nucleus 
B)  the charge on the nucleus 
C)  the total mass of the atom 
D)  the existence of protons 
E)  the presence of electrons outside the nucleus 
A)  the small size of the nucleus 
B)  the charge on the nucleus 
C)  the total mass of the atom 
D)  the existence of protons 
E)  the presence of electrons outside the nucleus

Question 15

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

Accepted Answer

A)  NaO, ionic compound 
B)  NaO, covalent compound 
C)  Na2O, ionic compound 
D)  Na2O, covalent compound 
E)  Na2O2, ionic compound 
A)  NaO, ionic compound 
B)  NaO, covalent compound 
C)  Na2O, ionic compound 
D)  Na2O, covalent compound 
E)  Na2O2, ionic compound

Question 16

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Accepted Answer

A)  261.97 amu 
B)  238.98 amu 
C)  161.97 amu 
D)  138.98 amu 
E)  74.99 amu 
A)  261.97 amu 
B)  238.98 amu 
C)  161.97 amu 
D)  138.98 amu 
E)  74.99 amu

Question 17

What is the formula for lithium nitrite?

Accepted Answer

A)  LiNO2 
B)  Li2NO2 
C)  LiNO3 
D)  Li2NO3 
E)  LiNO4 
A)  LiNO2 
B)  Li2NO2 
C)  LiNO3 
D)  Li2NO3 
E)  LiNO4

Question 18

What is the name of P4Se3?

Accepted Answer

A)  phosphorus selenide 
B)  phosphorus triselenide 
C)  tetraphosphorus selenide 
D)  phosphoric selenide 
E)  tetraphosphorus triselenide 
A)  phosphorus selenide 
B)  phosphorus triselenide 
C)  tetraphosphorus selenide 
D)  phosphoric selenide 
E)  tetraphosphorus triselenide

Question 19

Kaolinite, a clay mineral with the formula Al4Si4O10(OH)8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

Accepted Answer

A)  1.792 mass % 
B)  24.80 mass % 
C)  30.81 mass % 
D)  34.12 mass % 
E)  55.81 mass % 
A)  1.792 mass % 
B)  24.80 mass % 
C)  30.81 mass % 
D)  34.12 mass % 
E)  55.81 mass %

Question 20

What are the approximate carbon:hydrogen mass ratios in methane (CH4) and ethyne (C2H2)?

Accepted Answer

A)  1:4 and 1:1 
B)  3:2 and 6:1 
C)  3:1 and 12:1 
D)  3:2 and 12:1 
E)  3:1 and 6:1 
A)  1:4 and 1:1 
B)  3:2 and 6:1 
C)  3:1 and 12:1 
D)  3:2 and 12:1 
E)  3:1 and 6:1

Exam 2: The Components of Matter

The compound, (NH4)2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

The compound, P4S10, is used in the manufacture of safety matches. What is its name?

Which one of the following formulas of ionic compounds is the least likely to be correct?

Which one of the following is a polyatomic cation?

What is the name of the acid formed when HCN gas is dissolved in water?

In the ionic compound with the general formula M2 X3, the likely charge on X is

Which of the following compounds is ionic?

Who is credited with discovering the atomic nucleus?

Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.

Lead (Pb) is a main-group element.

The formula of heptane is

When an alkali metal combines with a non-metal, a covalent bond is normally formed.

Which one of the following combinations of names and formulas of ions is incorrect?

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

What is the formula for lithium nitrite?

What is the name of P4Se3?

Kaolinite, a clay mineral with the formula Al4Si4O10(OH)8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

What are the approximate carbon:hydrogen mass ratios in methane (CH4) and ethyne (C2H2)?

Keys to Studying Chemistry Definitions, Units, and Problem Solving

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces Liquids, Solids, and Phase Changes

The Properties of Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Equilibrium the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

The compound, (NH₄)₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

The compound, P₄S₁₀, is used in the manufacture of safety matches. What is its name?

In the ionic compound with the general formula M₂ X₃, the likely charge on X is

What is the name of P₄Se₃?

Kaolinite, a clay mineral with the formula Al₄Si₄O₁₀(OH)₈, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

What are the approximate carbon:hydrogen mass ratios in methane (CH₄) and ethyne (C₂H₂)?