Question 1

A measure of the quantity of matter in an object is known as:

Accepted Answer

A) atoms. 
B) density. 
C) mass. 
D) energy. 
A) atoms. 
B) density. 
C) mass. 
D) energy.

Question 2

Ionic bonds occur through a sharing of electrons.

Accepted Answer

A) True 
 B)False

Question 3

Buffering systems work to maintain pH within normal limits by:

Accepted Answer

A) adding hydrogen ions when conditions becomes too acidic. 
B) adding hydroxide ions when conditions become too basic. 
C) removing hydrogen ions when conditions become too acidic and adding hydrogen ions when conditions become too basic. 
D) adding hydrogen ions when conditions become too acidic and removing hydrogen ions when conditions become too basic. 
A) adding hydrogen ions when conditions becomes too acidic. 
B) adding hydroxide ions when conditions become too basic. 
C) removing hydrogen ions when conditions become too acidic and adding hydrogen ions when conditions become too basic. 
D) adding hydrogen ions when conditions become too acidic and removing hydrogen ions when conditions become too basic.

Question 4

Which of the following results from the making of a bond?

Accepted Answer

A) Atoms become more reactive. 
B) Molecules are broken down. 
C) Electrons are destroyed. 
D) Atoms become more stable. 
A) Atoms become more reactive. 
B) Molecules are broken down. 
C) Electrons are destroyed. 
D) Atoms become more stable.

Question 5

Potassium has one electron in its fourth shell,and chlorine has seven electrons in its third shell.Which of the following is most likely to be true?

Accepted Answer

A) Chlorine will give an electron to potassium to form an ionic bond. 
B) Potassium will give an electron to chlorine to form an ionic bond. 
C) The two atoms will share the electron unequally in a polar covalent bond. 
D) The two atoms will share an electron equally in a nonpolar covalent bond. 
A) Chlorine will give an electron to potassium to form an ionic bond. 
B) Potassium will give an electron to chlorine to form an ionic bond. 
C) The two atoms will share the electron unequally in a polar covalent bond. 
D) The two atoms will share an electron equally in a nonpolar covalent bond.

Question 6

You mix sugar in water and stir until it's completely dissolved.In this system,the water is the ________,the sugar is the ________,and the end result is a ________.

Accepted Answer

A) solute; solution; solvent 
B) solute; solvent; solution 
C) solvent; solution; solute 
D) solution; solvent; solute 
E) solvent; solute; solution 
A) solute; solution; solvent 
B) solute; solvent; solution 
C) solvent; solution; solute 
D) solution; solvent; solute 
E) solvent; solute; solution

Question 7

Atoms form bonds to:

Accepted Answer

A) fill their outer shells with neutrons. 
B) obtain an equal number of protons and electrons. 
C) fill their outer shells with electrons. 
D) fill their outer shells with protons. 
E) obtain an equal number of protons and neutrons. 
A) fill their outer shells with neutrons. 
B) obtain an equal number of protons and electrons. 
C) fill their outer shells with electrons. 
D) fill their outer shells with protons. 
E) obtain an equal number of protons and neutrons.

Question 8

A(n)________ has a higher pH than a(n)________.

Accepted Answer

The answer of A(n)________ has a higher pH than a(n)________....

Question 9

A polar covalent bond results when:

Accepted Answer

A) two atoms share electrons equally. 
B) two atoms of the same element are sharing electrons. 
C) one of the atoms sharing electrons is more electronegative than the other atom. 
D) two atoms sharing electrons are equally electronegative. 
A) two atoms share electrons equally. 
B) two atoms of the same element are sharing electrons. 
C) one of the atoms sharing electrons is more electronegative than the other atom. 
D) two atoms sharing electrons are equally electronegative.

Question 10

Temperatures on the Earth are moderated by the presence of so much water on the planet.Using your understanding of water's temperature-moderating abilities,predict what would happen to temperatures in the tropical and temperate regions if the oceans were made of alcohol instead of water.(Hint: Water has a higher specific heat than alcohol.)

Accepted Answer

Water's high specific heat means it is v

Question 11

All the mass of an atom is considered to be in the:

Accepted Answer

A) protons only. 
B) protons and neutrons. 
C) electrons only. 
D) protons, neutrons, and electrons. 
A) protons only. 
B) protons and neutrons. 
C) electrons only. 
D) protons, neutrons, and electrons.

Question 12

Water molecules are uncharged and ________.

Accepted Answer

The answer of Water molecules are uncharged and ________....

Question 13

Refer to the figure below, and then answer the question that follows.
  
-You are working in a chemistry lab,and your lab partner knocks over a beaker of hydrochloric acid.You alert your laboratory instructor,and he immediately pours another solution over the spill to neutralize the acid.Using the figure as a guide,what did your instructor pour onto the acid to neutralize it?

Accepted Answer

A) water 
B) baking soda 
C) lemon juice 
D) coffee 
A) water 
B) baking soda 
C) lemon juice 
D) coffee

Question 14

Acids release hydrogen ions into aqueous solutions.

Accepted Answer

A) True 
 B)False

Question 15

Refer to the figure below, and then answer the question that follows.
  
-Which of the following molecules is most likely to bind to an ion,and why?

Accepted Answer

A) Molecule A, because it has electrical charges that will attract an ion 
B) Molecule B, because it has four hydrogen atoms on the exterior of the molecule 
C) Molecule A, because any molecule with oxygen is able to bind to an ion 
D) Molecule B, because it has a carbon at in the center of the molecule 
A) Molecule A, because it has electrical charges that will attract an ion 
B) Molecule B, because it has four hydrogen atoms on the exterior of the molecule 
C) Molecule A, because any molecule with oxygen is able to bind to an ion 
D) Molecule B, because it has a carbon at in the center of the molecule

Question 16

The naturally occurring helium atom is chemically inert because:

Accepted Answer

A) its outermost shell is filled with electrons. 
B) its nucleus is filled with two neutrons. 
C) it has the most protons that it could ever carry. 
D) it has all of the shared electrons it could ever have. 
A) its outermost shell is filled with electrons. 
B) its nucleus is filled with two neutrons. 
C) it has the most protons that it could ever carry. 
D) it has all of the shared electrons it could ever have.

Question 17

What are the three most important subatomic particles in an atom called? Which one is involved in forming chemical bonds?

Accepted Answer

Protons,neutrons,and electrons

Question 18

The number of neutrons in the nucleus of an atom gives it a unique chemical nature.

Accepted Answer

A) True 
 B)False

Question 19

As an acid mixes in water:

Accepted Answer

A) the number of hydroxide ions will increase. 
B) the number of hydrogen ions will increase. 
C) the pH remains at 7. 
D) it becomes buffered. 
A) the number of hydroxide ions will increase. 
B) the number of hydrogen ions will increase. 
C) the pH remains at 7. 
D) it becomes buffered.

Question 20

For an atom to be considered an ion:

Accepted Answer

A) protons can outnumber neutrons. 
B) protons can outnumber electrons. 
C) neutrons can outnumber protons. 
D) protons equal electrons. 
A) protons can outnumber neutrons. 
B) protons can outnumber electrons. 
C) neutrons can outnumber protons. 
D) protons equal electrons.

Exam 2: Fundamental Building Blocks: Chemistry, water, and Ph

A measure of the quantity of matter in an object is known as:

Ionic bonds occur through a sharing of electrons.

Buffering systems work to maintain pH within normal limits by:

Which of the following results from the making of a bond?

Potassium has one electron in its fourth shell,and chlorine has seven electrons in its third shell.Which of the following is most likely to be true?

You mix sugar in water and stir until it's completely dissolved.In this system,the water is the ________,the sugar is the ________,and the end result is a ________.

Atoms form bonds to:

A(n)________ has a higher pH than a(n)________.

A polar covalent bond results when:

All the mass of an atom is considered to be in the:

Water molecules are uncharged and ________.

Acids release hydrogen ions into aqueous solutions.

Refer to the figure below, and then answer the question that follows. -Which of the following molecules is most likely to bind to an ion,and why?

The naturally occurring helium atom is chemically inert because:

What are the three most important subatomic particles in an atom called? Which one is involved in forming chemical bonds?

The number of neutrons in the nucleus of an atom gives it a unique chemical nature.

As an acid mixes in water:

For an atom to be considered an ion:

Science As a Way of Learning: a Guide to the Natural World

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

Filters

You mix sugar in water and stir until it's completely dissolved.In this system,the water is the ,the sugar is the ,and the end result is a .

A(n) has a higher pH than a(n).