Question 1

What effect does substitution of K2O for Na2O in making soda-lime glass have in its properties?

Accepted Answer

increases

Question 2

Which of the following equations correctly represents the reaction of B2H6 with oxygen?

Accepted Answer

A) B2H6 (g)+ 3O2 (g)→ B2O3 (s)+ 3H2O (g) 
B) B2H6 (g)+ O2 (g)→ B2O2 (s)+ 3H2 (g) 
C) B2H6 (g)+ 2O2 (g)→ B2H2 (s)+ 2H2O2 (aq) 
D) B2H6 (g)+ 2O2 (g)→ B2O2 (s)+ 3H2 + O2 (g) 
E) B2H6 (g)+ O2 (g)→ H2B2O2 (s)+ 2H2 (g) 
A) B2H6 (g)+ 3O2 (g)→ B2O3 (s)+ 3H2O (g) 
B) B2H6 (g)+ O2 (g)→ B2O2 (s)+ 3H2 (g) 
C) B2H6 (g)+ 2O2 (g)→ B2H2 (s)+ 2H2O2 (aq) 
D) B2H6 (g)+ 2O2 (g)→ B2O2 (s)+ 3H2 + O2 (g) 
E) B2H6 (g)+ O2 (g)→ H2B2O2 (s)+ 2H2 (g)

Question 3

An example of a form of pure carbon that contains only sp3 hybridized carbon atoms is __________.

Accepted Answer

A) diamond 
B) charcoal 
C) graphite 
D) carbon black 
E) carborundum 
A) diamond 
B) charcoal 
C) graphite 
D) carbon black 
E) carborundum

Question 4

The reduction of metal oxides uses carbon monoxide.

Accepted Answer

A) True 
 B)False

Question 5

The danger from mixing ammonia with bleach is the production of __________.

Accepted Answer

The answer of The danger from mixing ammonia with bleach...

Question 6

I am a highly polar, strongly hydrogen-bonded liquid with a density of 1.47 g/cm3. I can decompose to form O2. Who am I?

Accepted Answer

Question 7

Calcium carbide is a solid source of acetylene.

Accepted Answer

A) True 
 B)False

Question 8

The most common isotope of hydrogen is sometimes referred to as __________.

Accepted Answer

A) deuterium 
B) protium 
C) tritium 
D) heavy hydrogen 
E) common hydrogen 
A) deuterium 
B) protium 
C) tritium 
D) heavy hydrogen 
E) common hydrogen

Question 9

Explain why silicon does not form any allotropes with structures analogous to that of graphite or buckminsterfullerenes, even though it is in the same group as carbon.

Accepted Answer

Silicon is large enough to pre

Question 10

__________ has the lowest boiling point of any substance known.

Accepted Answer

A) Ne 
B) He 
C) Ar 
D) Kr 
E) Rn 
A) Ne 
B) He 
C) Ar 
D) Kr 
E) Rn

Question 11

The least electronegative of the elements below is __________.

Accepted Answer

A) I 
B) Cl 
C) H 
D) F 
E) Br 
A) I 
B) Cl 
C) H 
D) F 
E) Br

Question 12

If a metal forms more than one oxide, the acidic character of the oxide increases as the oxidation state of the metal __________.

Accepted Answer

The answer of If a metal forms more than one...

Question 13

Additives can be used in soda-lime glass to alter its __________.

Accepted Answer

A) ability to withstand temperature change 
B) color 
C) hardness 
D) melting point 
E) any of the above 
A) ability to withstand temperature change 
B) color 
C) hardness 
D) melting point 
E) any of the above

Question 14

Most mined phosphate rock is __________.

Accepted Answer

A) used as a strong acid 
B) used as a reducing agent 
C) used as a detergent 
D) converted to fertilizer 
E) discarded as a by-product 
A) used as a strong acid 
B) used as a reducing agent 
C) used as a detergent 
D) converted to fertilizer 
E) discarded as a by-product

Question 15

The electron-pair geometry and molecular geometry of XeF2 are __________ and __________, respectively.

Accepted Answer

A) trigonal bipyramidal; bent 
B) trigonal bipyramidal; linear 
C) trigonal bipyramidal; Bent 
D) octahedral; linear 
E) octahedral; bent 
A) trigonal bipyramidal; bent 
B) trigonal bipyramidal; linear 
C) trigonal bipyramidal; Bent 
D) octahedral; linear 
E) octahedral; bent

Question 16

The balanced equation for the production of ethylene from calcium carbide is __________.

Accepted Answer

CaC₂ + 2H₂O

Question 17

Boric oxide is __________.

Accepted Answer

A) B2O 
B) BO2 
C) BO 
D) B2O3 
E) B2O4 
A) B2O 
B) BO2 
C) BO 
D) B2O3 
E) B2O4

Question 18

The arrangement of oxygen atoms around a silicon atom in SiO44- is

Accepted Answer

A) square planar 
B) octahedral 
C) linear 
D) tetrahedral 
E) trigonal pyramidal 
A) square planar 
B) octahedral 
C) linear 
D) tetrahedral 
E) trigonal pyramidal

Question 19

Write the correctly balanced equation for the reaction between elemental fluorine and sodium iodide.

Accepted Answer

F₂ + 2 NaI

Question 20

Addition of B2O3 to soda-lime glass

Accepted Answer

A) imparts a greater ability to withstand temperature change. 
B) imparts a deep blue color. 
C) results in a denser glass with a higher refractive index. 
D) results in a glass with a lower melting point. 
E) results in opaque glass. 
A) imparts a greater ability to withstand temperature change. 
B) imparts a deep blue color. 
C) results in a denser glass with a higher refractive index. 
D) results in a glass with a lower melting point. 
E) results in opaque glass.

Exam 22: Chemistry of the Nonmetals

What effect does substitution of K2O for Na2O in making soda-lime glass have in its properties?

Which of the following equations correctly represents the reaction of B2H6 with oxygen?

An example of a form of pure carbon that contains only sp3 hybridized carbon atoms is __________.

The reduction of metal oxides uses carbon monoxide.

The danger from mixing ammonia with bleach is the production of __________.

I am a highly polar, strongly hydrogen-bonded liquid with a density of 1.47 g/cm3. I can decompose to form O2. Who am I?

Calcium carbide is a solid source of acetylene.

The most common isotope of hydrogen is sometimes referred to as __________.

Explain why silicon does not form any allotropes with structures analogous to that of graphite or buckminsterfullerenes, even though it is in the same group as carbon.

__________ has the lowest boiling point of any substance known.

The least electronegative of the elements below is __________.

If a metal forms more than one oxide, the acidic character of the oxide increases as the oxidation state of the metal __________.

Additives can be used in soda-lime glass to alter its __________.

Most mined phosphate rock is __________.

The electron-pair geometry and molecular geometry of XeF2 are __________ and __________, respectively.

The balanced equation for the production of ethylene from calcium carbide is __________.

Boric oxide is __________.

The arrangement of oxygen atoms around a silicon atom in SiO44- is

Write the correctly balanced equation for the reaction between elemental fluorine and sodium iodide.

Addition of B2O3 to soda-lime glass

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

What effect does substitution of K₂O for Na₂O in making soda-lime glass have in its properties?

Which of the following equations correctly represents the reaction of B₂H₆ with oxygen?

An example of a form of pure carbon that contains only sp³ hybridized carbon atoms is __________.

I am a highly polar, strongly hydrogen-bonded liquid with a density of 1.47 g/cm³. I can decompose to form O₂. Who am I?

The electron-pair geometry and molecular geometry of XeF₂ are and , respectively.

The arrangement of oxygen atoms around a silicon atom in SiO₄^4- is

Addition of B₂O₃ to soda-lime glass