Question 1

Which covalent bond involves only 2 electrons:

Accepted Answer

A)  single 
B)  double 
C)  triple 
D)  single and double. 
E)  single and triple. 
A)  single 
B)  double 
C)  triple 
D)  single and double. 
E)  single and triple.

Question 2

Chlorine has seven electrons in its valence shell.The number of electrons it must gain to complete its valence shell is:

Accepted Answer

A)  one. 
B)  two. 
C)  three. 
D)  seven. 
E)  eight. 
A)  one. 
B)  two. 
C)  three. 
D)  seven. 
E)  eight.

Question 3

The hydrogen bonds of water play an important role in the ability of animals to regulate their body temperature.Explain how this occurs.

Accepted Answer

Concepts to Consider: Transfer

Question 4

Oxidation occurs when an atom gains one or more electrons.
__________________

Accepted Answer

A) True 
 B)False

Question 5

Which of the following has a pH closest to that of human blood?

Accepted Answer

A)  beer 
B)  coffee 
C)  rain water 
D)  sea water 
E)  oven cleaner 
A)  beer 
B)  coffee 
C)  rain water 
D)  sea water 
E)  oven cleaner

Question 6

Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary action
-Directly responsible for the ability of certain insects to walk on water

Accepted Answer

The answer of Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary...

Question 7

The cohesiveness between water molecules is due largely to:

Accepted Answer

A)  hydrogen bonds. 
B)  polar covalent bonds. 
C)  nonpolar covalent bonds. 
D)  ionic bonds. 
E)  hydrophobic interactions. 
A)  hydrogen bonds. 
B)  polar covalent bonds. 
C)  nonpolar covalent bonds. 
D)  ionic bonds. 
E)  hydrophobic interactions.

Question 8

The process whereby water molecules surround ions during the process of dissolving is called:

Accepted Answer

A)  reduction. 
B)  hydration. 
C)  buffering. 
D)  oxidation. 
E)  vaporization. 
A)  reduction. 
B)  hydration. 
C)  buffering. 
D)  oxidation. 
E)  vaporization.

Question 9

Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary action
-Sticking together of like molecules

Accepted Answer

The answer of Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary...

Question 10

How many molecules are present in one mole of C6H12O6?

Accepted Answer

A)  1.7 *10-10 molecules 
B)  1.3 F* 1010 molecules 
C)  24 molecules 
D)  1.7 * 1022 molecules 
E)  6.02 * 1023 molecules 
A)  1.7 *10-10 molecules 
B)  1.3 F* 1010 molecules 
C)  24 molecules 
D)  1.7 * 1022 molecules 
E)  6.02 * 1023 molecules

Question 11

The atomic mass determines the type of element.
__________________

Accepted Answer

A) True 
 B)False

Question 12

Figure 2-2
Use the figure below to answer the corresponding question(s).  
-The type of bond illustrated in Figure 2-2 is:

Accepted Answer

A)  an ionic bond. 
B)  a polar bond. 
C)  a single covalent bond. 
D)  a hydrogen bond. 
E)  a double covalent bond. 
A)  an ionic bond. 
B)  a polar bond. 
C)  a single covalent bond. 
D)  a hydrogen bond. 
E)  a double covalent bond.

Question 13

What is the OH -- concentration of a solution having a pH of 2?

Accepted Answer

A)  1 *10-12 
B)  1 *10-10 
C)  1 *10-7 
D)  1* 10-2 
E)  1 *10-1 
A)  1 *10-12 
B)  1 *10-10 
C)  1 *10-7 
D)  1* 10-2 
E)  1 *10-1

Question 14

Which component becomes oxidized in the following chemical reaction? 4 Fe + 3 O2 $\rightarrow$ 2 Fe2O3

Accepted Answer

A)  water 
B)  iron 
C)  oxygen 
D)  rust 
E)  hydrogen 
A)  water 
B)  iron 
C)  oxygen 
D)  rust 
E)  hydrogen

Question 15

An inorganic compound is one that contains carbon.
__________________

Accepted Answer

A) True 
 B)False

Question 16

Any chemical interaction between atoms:

Accepted Answer

A)  involves neutrons. 
B)  may potentially involve any electron. 
C)  involves protons. 
D)  involves only valence electrons. 
E)  involves only the nuclear subatomic particles. 
A)  involves neutrons. 
B)  may potentially involve any electron. 
C)  involves protons. 
D)  involves only valence electrons. 
E)  involves only the nuclear subatomic particles.

Question 17

An example of an anion is K+.
__________________

Accepted Answer

A) True 
 B)False

Question 18

At what temperature is water most dense?

Accepted Answer

A)  0 degrees Celsius 
B)  1 degree Celsius 
C)  4 degrees Celsius 
D)  10 degrees Celsius 
E)  100 degrees Celsius 
A)  0 degrees Celsius 
B)  1 degree Celsius 
C)  4 degrees Celsius 
D)  10 degrees Celsius 
E)  100 degrees Celsius

Question 19

Explain the role of carbon dioxide in maintaining blood pH levels.

Accepted Answer

Concepts to Consider

Question 20

A pH of 4 is __________ times more __________ than a pH of 7.

Accepted Answer

A)  3; basic 
B)  3; acidic 
C)  1000; neutral 
D)  1000; basic 
E)  1000; acidic 
A)  3; basic 
B)  3; acidic 
C)  1000; neutral 
D)  1000; basic 
E)  1000; acidic

Exam 2: Atoms and Molecules: the Chemical Basis of Life

Which covalent bond involves only 2 electrons:

Chlorine has seven electrons in its valence shell.The number of electrons it must gain to complete its valence shell is:

The hydrogen bonds of water play an important role in the ability of animals to regulate their body temperature.Explain how this occurs.

Oxidation occurs when an atom gains one or more electrons. __________________

Which of the following has a pH closest to that of human blood?

Match the term with its description: a.adhesion c.surface tension b.cohesion d.capillary action -Directly responsible for the ability of certain insects to walk on water

The cohesiveness between water molecules is due largely to:

The process whereby water molecules surround ions during the process of dissolving is called:

Match the term with its description: a.adhesion c.surface tension b.cohesion d.capillary action -Sticking together of like molecules

How many molecules are present in one mole of C6H12O6?

The atomic mass determines the type of element. __________________

Figure 2-2 Use the figure below to answer the corresponding question(s). -The type of bond illustrated in Figure 2-2 is:

What is the OH -- concentration of a solution having a pH of 2?

Which component becomes oxidized in the following chemical reaction? 4 Fe + 3 O2 →\rightarrow→ 2 Fe2O3

An inorganic compound is one that contains carbon. __________________

Any chemical interaction between atoms:

An example of an anion is K+. __________________

At what temperature is water most dense?

Explain the role of carbon dioxide in maintaining blood pH levels.

A pH of 4 is __________ times more __________ than a pH of 7.

A View of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

How many molecules are present in one mole of C₆H₁₂O₆?

What is the OH ^-- concentration of a solution having a pH of 2?

Which component becomes oxidized in the following chemical reaction? 4 Fe + 3 O₂ $\rightarrow$ 2 Fe₂O₃

An example of an anion is K⁺. __________________

A pH of 4 is times more than a pH of 7.