Question 1

Identify the perchlorate ion.

Accepted Answer

A)  Cl   
B)  Cl   
C)  Cl   
D)  Cl   
E)  Cl- 
A)  Cl   
B)  Cl   
C)  Cl   
D)  Cl   
E)  Cl-

Question 2

What is the molar mass of nitrogen gas?

Accepted Answer

A)  14.0 g mol-1 
B)  28.0 g mol-1 
C)  6.02 × 1023 g mol-1 
D)  1.20 × 1023 g mol-1 
A)  14.0 g mol-1 
B)  28.0 g mol-1 
C)  6.02 × 1023 g mol-1 
D)  1.20 × 1023 g mol-1

Question 3

How many Fe(II) ions are there in 20.0 g of FeSO4?

Accepted Answer

A)  2.19 × 10-25 iron(II) ions 
B)  7.92 × 1022 iron(II) ions 
C)  4.57 × 1024 iron(II) ions 
D)  1.82 × 1027 iron(II) ions 
A)  2.19 × 10-25 iron(II) ions 
B)  7.92 × 1022 iron(II) ions 
C)  4.57 × 1024 iron(II) ions 
D)  1.82 × 1027 iron(II) ions

Question 4

How many cations are there in 10.0 g of sodium phosphate?

Accepted Answer

A)  3.67 × 1022 cations 
B)  1.10 × 1023 cations 
C)  9.87 × 1024 cations 
D)  2.96 × 1025 cations 
A)  3.67 × 1022 cations 
B)  1.10 × 1023 cations 
C)  9.87 × 1024 cations 
D)  2.96 × 1025 cations

Question 5

Identify a possible molecular formula for a compound with an empirical formula C3H5ClO.

Accepted Answer

A)  C6H10ClO2 
B)  C5H10Cl2O2 
C)  C6H10Cl2O2 
D)  C6H10O2 
E)  C6H12Cl2O2 
A)  C6H10ClO2 
B)  C5H10Cl2O2 
C)  C6H10Cl2O2 
D)  C6H10O2 
E)  C6H12Cl2O2

Question 6

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g mol-1.

Accepted Answer

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

Question 7

Identify the formula for sodium chlorate.

Accepted Answer

A)  NaClO 
B)  NaClO2 
C)  NaClO3 
D)  NaClO4 
A)  NaClO 
B)  NaClO2 
C)  NaClO3 
D)  NaClO4

Question 8

How many moles of C3H8 contain 9.25 × 1024 molecules of C3H8?

Accepted Answer

A)  65.1 moles C3H8 
B)  28.6 moles C3H8 
C)  34.9 moles C3H8 
D)  46.2 moles C3H8 
E)  15.4 moles C3H8 
A)  65.1 moles C3H8 
B)  28.6 moles C3H8 
C)  34.9 moles C3H8 
D)  46.2 moles C3H8 
E)  15.4 moles C3H8

Question 9

How many moles of PCl3 contain 3.68 × 1025 chlorine atoms?

Accepted Answer

A)  61.1 moles PCl3 
B)  20.4 moles PCl3 
C)  16.4 moles PCl3 
D)  54.5 moles PCl3 
E)  49.1 moles PCl3 
A)  61.1 moles PCl3 
B)  20.4 moles PCl3 
C)  16.4 moles PCl3 
D)  54.5 moles PCl3 
E)  49.1 moles PCl3

Question 10

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol-1 and an empirical formula of NO2.

Accepted Answer

A)  N2O3 
B)  N3O6 
C)  N2O4 
D)  NO2 
E)  N2O5 
A)  N2O3 
B)  N3O6 
C)  N2O4 
D)  NO2 
E)  N2O5

Question 11

Identify a carboxylic acid.

Accepted Answer

A)  CH3CH2OCH2CH3 
B)  CH3CH2OH 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH 
A)  CH3CH2OCH2CH3 
B)  CH3CH2OH 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH

Question 12

How many molecules are in 0.1339 kg of ethanol,C2H6O?

Accepted Answer

A)  1.750 × 1024 
B)  3.715 × 1027 
C)  5.712 × 10-25 
D)  9.763 × 1019 
E)  9.763 × 1022 
A)  1.750 × 1024 
B)  3.715 × 1027 
C)  5.712 × 10-25 
D)  9.763 × 1019 
E)  9.763 × 1022

Question 13

Which of the following statements is FALSE?

Accepted Answer

A)  Hydrocarbons are organic compounds. 
B)  Organic compounds are composed of nitrogen, oxygen, and sulfur. 
C)  The three types of hydrocarbons are alkane, alkene, and alkynes. 
D)  All organic compounds can be classified as hydrocarbons with one or more functional groups. 
E)  The commonly known functionalized hydrocarbons are alcohols, ethers, aldehydes, ketones, esters, carboxylic acids, and amines. 
A)  Hydrocarbons are organic compounds. 
B)  Organic compounds are composed of nitrogen, oxygen, and sulfur. 
C)  The three types of hydrocarbons are alkane, alkene, and alkynes. 
D)  All organic compounds can be classified as hydrocarbons with one or more functional groups. 
E)  The commonly known functionalized hydrocarbons are alcohols, ethers, aldehydes, ketones, esters, carboxylic acids, and amines.

Question 14

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Accepted Answer

A)  NO 
B)  N2O 
C)  NO2 
D)  N2O3 
E)  NO3 
A)  NO 
B)  N2O 
C)  NO2 
D)  N2O3 
E)  NO3

Question 15

Calculate the molar mass for Mg(ClO4)2.

Accepted Answer

A)  223.21 g mol-1 
B)  123.76 g mol-1 
C)  119.52 g mol-1 
D)  247.52 g mol-1 
E)  75.76 g mol-1 
A)  223.21 g mol-1 
B)  123.76 g mol-1 
C)  119.52 g mol-1 
D)  247.52 g mol-1 
E)  75.76 g mol-1

Question 16

In which set do all elements tend to form cations in binary ionic compounds?

Accepted Answer

A)  K, Ga, O 
B)  Sr, Ni, Hg 
C)  N, P, Bi 
D)  O, Br, I 
A)  K, Ga, O 
B)  Sr, Ni, Hg 
C)  N, P, Bi 
D)  O, Br, I

Question 17

What type of bonding is found in the compound O F2?

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 18

Match the following.
-oxygen

Accepted Answer

A) Ne(g) 
B) Cl2(g) 
C) Ca2(s) 
D) Ne2(g) 
E) Ca(s)
F)H2(g)
G)I2(s)
H)H(g)
I)Cl(g)
J)O(g)
K)O2(g)
L)I(s) 
A) Ne(g) 
B) Cl2(g) 
C) Ca2(s) 
D) Ne2(g) 
E) Ca(s)
F)H2(g)
G)I2(s)
H)H(g)
I)Cl(g)
J)O(g)
K)O2(g)
L)I(s)

Question 19

Identify a hydrocarbon.

Accepted Answer

A)  CH3CH2OCH2CH3 
B)  CH3CH2OH 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH 
A)  CH3CH2OCH2CH3 
B)  CH3CH2OH 
C)  CH3CH2NH2 
D)  CH3CH2CH2CH3 
E)  CH3COOH

Question 20

Match the following.
-hydrogen

Accepted Answer

A) Ne(g) 
B) Cl2(g) 
C) Ca2(s) 
D) Ne2(g) 
E) Ca(s)
F)H2(g)
G)I2(s)
H)H(g)
I)Cl(g)
J)O(g)
K)O2(g)
L)I(s) 
A) Ne(g) 
B) Cl2(g) 
C) Ca2(s) 
D) Ne2(g) 
E) Ca(s)
F)H2(g)
G)I2(s)
H)H(g)
I)Cl(g)
J)O(g)
K)O2(g)
L)I(s)

Exam 3: Molecules, Compounds, and Nomenclature

Identify the perchlorate ion.

What is the molar mass of nitrogen gas?

How many Fe(II) ions are there in 20.0 g of FeSO4?

How many cations are there in 10.0 g of sodium phosphate?

Identify a possible molecular formula for a compound with an empirical formula C3H5ClO.

How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05 g mol-1.

Identify the formula for sodium chlorate.

How many moles of C3H8 contain 9.25 × 1024 molecules of C3H8?

How many moles of PCl3 contain 3.68 × 1025 chlorine atoms?

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol-1 and an empirical formula of NO2.

Identify a carboxylic acid.

How many molecules are in 0.1339 kg of ethanol,C2H6O?

Which of the following statements is FALSE?

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Calculate the molar mass for Mg(ClO4)2.

In which set do all elements tend to form cations in binary ionic compounds?

What type of bonding is found in the compound O F2?

Match the following. -oxygen

Identify a hydrocarbon.

Match the following. -hydrogen

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

How many Fe(II) ions are there in 20.0 g of FeSO₄?

Identify a possible molecular formula for a compound with an empirical formula C₃H₅ClO.

How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃is 126.05 g mol^-1.

How many moles of C₃H₈ contain 9.25 × 10²⁴ molecules of C₃H₈?

How many moles of PCl₃ contain 3.68 × 10²⁵ chlorine atoms?

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol^-1 and an empirical formula of NO₂.

How many molecules are in 0.1339 kg of ethanol,C₂H₆O?

Calculate the molar mass for Mg(ClO₄)₂.

What type of bonding is found in the compound O F₂?