Question 1

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 2

The chemical formula for the selenite ion is

Accepted Answer

A) Se-. 
B) Se2-. 
C) SeO32-. 
D) SeO42-. 
A) Se-. 
B) Se2-. 
C) SeO32-. 
D) SeO42-.

Question 3

Describe the difference between ionic and molecular compounds. Give an example of each.

Accepted Answer

An ionic compound is formed between a me

Question 4

Identify the formula for copper (II)sulfate pentahydrate.

Accepted Answer

A) Cu2SO3∙H5 
B) Cu2S∙H2O 
C) CuS∙5H2O 
D) (CuSO4)5 
E) CuSO4∙5H2O 
A) Cu2SO3∙H5 
B) Cu2S∙H2O 
C) CuS∙5H2O 
D) (CuSO4)5 
E) CuSO4∙5H2O

Question 5

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 6

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 7

Identify 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

Identify the charge, X, on the barium ion BaX

Accepted Answer

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

Question 9

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 10

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 11

A covalent bond is best described as

Accepted Answer

A) the sharing of electrons between atoms. 
B) the transfer of electrons. 
C) a bond between a metal and a nonmetal. 
D) a bond between a metal and a polyatomic ion. 
E) a bond between two polyatomic ions. 
A) the sharing of electrons between atoms. 
B) the transfer of electrons. 
C) a bond between a metal and a nonmetal. 
D) a bond between a metal and a polyatomic ion. 
E) a bond between two polyatomic ions.

Question 12

A certain alcohol contains only three elements, carbon, hydrogen, and oxygen. Combustion of a 50.00 g sample of the alcohol produced 95.50 g of CO2 and 58.70 g of H2O. What is the empirical formula of the alcohol?

Accepted Answer

Question 13

Match the following.

-neon

Accepted Answer

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

Question 14

Combustion analysis of an unknown hydrocarbon produced the following results: C 60.00%, H 4.48%, O 35.52%. Determine the empirical formula.

Accepted Answer

A) C9H9O5 
B) C9H8O3 
C) C8H9O4 
D) C9H8O4 
E) C8H8O4 
A) C9H9O5 
B) C9H8O3 
C) C8H9O4 
D) C9H8O4 
E) C8H8O4

Question 15

Why aren't prefixes used in naming ionic compounds?

Accepted Answer

The charges on the ions dictate how many

Question 16

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

Accepted Answer

Question 17

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 18

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 19

Identify the perchlorate ion.

Accepted Answer

A) ClO-2 
B) ClO-3 
C) ClO-4 
D) ClO- 
E) Cl- 
A) ClO-2 
B) ClO-3 
C) ClO-4 
D) ClO- 
E) Cl-

Question 20

What is the charge on an aluminum ion?

Accepted Answer

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

Exam 3: Molecules, Compounds, and Nomenclature

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

The chemical formula for the selenite ion is

Describe the difference between ionic and molecular compounds. Give an example of each.

Identify the formula for copper (II)sulfate pentahydrate.

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

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

Identify the correct formula for aluminum sulfate.

Identify the charge, X, on the barium ion BaX

Calculate the molar mass for Mg(ClO4)2.

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

A covalent bond is best described as

A certain alcohol contains only three elements, carbon, hydrogen, and oxygen. Combustion of a 50.00 g sample of the alcohol produced 95.50 g of CO2 and 58.70 g of H2O. What is the empirical formula of the alcohol?

Match the following. -neon

Combustion analysis of an unknown hydrocarbon produced the following results: C 60.00%, H 4.48%, O 35.52%. Determine the empirical formula.

Why aren't prefixes used in naming ionic compounds?

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

Which of the following is a molecular element?

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

Identify the perchlorate ion.

What is the charge on an aluminum ion?

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 Metallury

Transition Metals and Coordination Compounds

Filters

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

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

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

Identify the charge, X, on the barium ion Ba^X

Calculate the molar mass for Mg(ClO₄)₂.

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

A certain alcohol contains only three elements, carbon, hydrogen, and oxygen. Combustion of a 50.00 g sample of the alcohol produced 95.50 g of CO₂ and 58.70 g of H₂O. What is the empirical formula of the alcohol?

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