Question 1

Which of the following is an ionic compound?

Accepted Answer

A)  LiCl 
B)  NO2 
C)  PCl3 
D)  CF4 
E)  SeBr2 
A)  LiCl 
B)  NO2 
C)  PCl3 
D)  CF4 
E)  SeBr2

Question 2

Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.

Accepted Answer

A)  P3Cl 
B)  PCl 
C)  PCl2 
D)  P2Cl3 
E)  PCl3 
A)  P3Cl 
B)  PCl 
C)  PCl2 
D)  P2Cl3 
E)  PCl3

Question 3

Rb2S is named ________.

Accepted Answer

A)  rubidium disulfide 
B)  rubidium sulfide 
C)  rubidium(II) sulfide 
D)  rubidium sulfur 
A)  rubidium disulfide 
B)  rubidium sulfide 
C)  rubidium(II) sulfide 
D)  rubidium sulfur

Question 4

The chemical formula for lithium peroxide is ________.

Accepted Answer

A)  LiOH 
B)  LiO2 
C)  Li2O 
D)  Li2O2 
A)  LiOH 
B)  LiO2 
C)  Li2O 
D)  Li2O2

Question 5

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 6

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na2Cr2O7?

Accepted Answer

A)  0. 187 oxygen atoms 
B)  2.30 × 1021 oxygen atoms 
C)  1.60 × 1022 oxygen atoms 
D)  1.13 × 1023 oxygen atoms 
A)  0. 187 oxygen atoms 
B)  2.30 × 1021 oxygen atoms 
C)  1.60 × 1022 oxygen atoms 
D)  1.13 × 1023 oxygen atoms

Question 7

Determine the name for aqueous HClO3.

Accepted Answer

A)  hydrochloric acid 
B)  hydrochlorous acid 
C)  chlorate acid 
D)  chloric acid 
E)  perchloric acid 
A)  hydrochloric acid 
B)  hydrochlorous acid 
C)  chlorate acid 
D)  chloric acid 
E)  perchloric acid

Question 8

Describe the difference between a molecular formula and an empirical formula. Give an example.

Accepted Answer

A molecular formula is the exact number

Question 9

Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 0.80 g of methane reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide?

Accepted Answer

A)  1.8 g 
B)  2.2 g 
C)  3.7 g 
D)  4.0 g 
A)  1.8 g 
B)  2.2 g 
C)  3.7 g 
D)  4.0 g

Question 10

Identify the name for Sn(SO4)2. Remember that Sn forms several ions.

Accepted Answer

A)  tin(I) sulfite 
B)  tin(IV) sulfate 
C)  tin sulfide 
D)  tin(II) sulfite 
E)  tin(I) sulfate 
A)  tin(I) sulfite 
B)  tin(IV) sulfate 
C)  tin sulfide 
D)  tin(II) sulfite 
E)  tin(I) sulfate

Question 11

What is the empirical formula of a substance that contains 2.64 g of C, 0.887 g of H, and 3.52 g of O?

Accepted Answer

A)  CH4O  
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4 
A)  CH4O  
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4

Question 12

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Accepted Answer

A)  7.02 × 103 moles N2O4 
B)  1.42 × 10-4 moles N2O4 
C)  1.00 mole N2O4 
D)  1.21 moles N2O4 
E)  0.829 moles N2O4 
A)  7.02 × 103 moles N2O4 
B)  1.42 × 10-4 moles N2O4 
C)  1.00 mole N2O4 
D)  1.21 moles N2O4 
E)  0.829 moles N2O4

Question 13

Which of the following is a molecular element?

Accepted Answer

A)  Mg 
B)  Ar 
C)  Xe 
D)  I 
E)  Li 
A)  Mg 
B)  Ar 
C)  Xe 
D)  I 
E)  Li

Question 14

Determine the empirical formula for a compound that contains C, H, and O. It contains 52.14% C and 34.73% O by mass.

Accepted Answer

A)  C2H6O 
B)  CHO 
C)  C4H13O2 
D)  CH4O3 
E)  CH3O 
A)  C2H6O 
B)  CHO 
C)  C4H13O2 
D)  CH4O3 
E)  CH3O

Question 15

The chemical formula for calcium nitride is ________.

Accepted Answer

A)  Ca(NO3)2 
B)  Ca(NO2)2 
C)  Ca3N2 
D)  CaN2 
A)  Ca(NO3)2 
B)  Ca(NO2)2 
C)  Ca3N2 
D)  CaN2

Question 16

Which of the following contains both ionic and covalent bonds?

Accepted Answer

A)  KI 
B)  NH4Cl 
C)  CaS 
D)  H2S 
E)  SiF4 
A)  KI 
B)  NH4Cl 
C)  CaS 
D)  H2S 
E)  SiF4

Question 17

How many moles of C3H8 contain 4.95 × 1024 hydrogen atoms?

Accepted Answer

A)  8.22 moles C3H8 
B)  6.58 moles C3H8 
C)  1.03 moles C3H8 
D)  9.73 moles C3H8 
E)  3.09 moles C3H8 
A)  8.22 moles C3H8 
B)  6.58 moles C3H8 
C)  1.03 moles C3H8 
D)  9.73 moles C3H8 
E)  3.09 moles C3H8

Question 18

Which of the following is an ionic compound?

Accepted Answer

A)  SCl2 
B)  Mg3(PO4)2 
C)  Cl2O 
D)  CH2O 
E)  PF5 
A)  SCl2 
B)  Mg3(PO4)2 
C)  Cl2O 
D)  CH2O 
E)  PF5

Question 19

What is the mass of 0.500 mol of dichlorodifluoro methane, C Cl2F2?

Accepted Answer

A)  4.14 × 10-3 g 
B)  60.5 g 
C)  121 g 
D)  242 g 
A)  4.14 × 10-3 g 
B)  60.5 g 
C)  121 g 
D)  242 g

Question 20

What is the common name of the polyatomic anion NO3?

Accepted Answer

A)  Nitrate 
B)  Nitrite 
C)  Hyponitrite 
D)  Pernitrate 
E)  Hypo Nitrate 
A)  Nitrate 
B)  Nitrite 
C)  Hyponitrite 
D)  Pernitrate 
E)  Hypo Nitrate

Exam 3: Molecules, Compounds, and Nomenclature

Which of the following is an ionic compound?

Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl.

Rb2S is named ________.

The chemical formula for lithium peroxide is ________.

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

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na2Cr2O7?

Determine the name for aqueous HClO3.

Describe the difference between a molecular formula and an empirical formula. Give an example.

Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 0.80 g of methane reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide?

Identify the name for Sn(SO4)2. Remember that Sn forms several ions.

What is the empirical formula of a substance that contains 2.64 g of C, 0.887 g of H, and 3.52 g of O?

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g mol-1.

Which of the following is a molecular element?

Determine the empirical formula for a compound that contains C, H, and O. It contains 52.14% C and 34.73% O by mass.

The chemical formula for calcium nitride is ________.

Which of the following contains both ionic and covalent bonds?

How many moles of C3H8 contain 4.95 × 1024 hydrogen atoms?

Which of the following is an ionic compound?

What is the mass of 0.500 mol of dichlorodifluoro methane, C Cl2F2?

What is the common name of the polyatomic anion NO3?

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Rb₂S is named ________.

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

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na₂Cr₂O₇?

Determine the name for aqueous HClO₃.

Identify the name for Sn(SO₄)₂. Remember that Sn forms several ions.

How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g mol^-1.

How many moles of C₃H₈ contain 4.95 × 10²⁴ hydrogen atoms?

What is the mass of 0.500 mol of dichlorodifluoro methane, C Cl₂F₂?

What is the common name of the polyatomic anion NO₃?