Question 1

An acid is a substance that, in solution, releases

Accepted Answer

A)  oxygen ions in H2SO4. 
B)  hydrogen ions, for example, HCl. 
C)  -COOR ions from beer. 
D)  chloride ions from NaCl. 
A)  oxygen ions in H2SO4. 
B)  hydrogen ions, for example, HCl. 
C)  -COOR ions from beer. 
D)  chloride ions from NaCl.

Question 2

If a particular atom has 27 electrons, 27 protons, and 31 neutrons, its mass number would be

Accepted Answer

A)  52. 
B)  54. 
C)  56. 
D)  58. 
A)  52. 
B)  54. 
C)  56. 
D)  58.

Question 3

A substance that is a solid

Accepted Answer

A)  contains a large amount of oxygen. 
B)  contains molecules that are packed tightly together and vibrate in place. 
C)  is bonded very tightly (covalent). 
D)  contains a large amount of hydrogen bonds. 
A)  contains a large amount of oxygen. 
B)  contains molecules that are packed tightly together and vibrate in place. 
C)  is bonded very tightly (covalent). 
D)  contains a large amount of hydrogen bonds.

Question 4

The mass of a given volume of matter is expressed as

Accepted Answer

A)  weight. 
B)  energy. 
C)  density. 
D)  gravity. 
A)  weight. 
B)  energy. 
C)  density. 
D)  gravity.

Question 5

When a pencil falls from a tabletop to the floor

Accepted Answer

A)  kinetic energy is converted to potential energy. 
B)  potential energy is converted to kinetic energy. 
C)  energy is created. 
D)  energy is destroyed. 
A)  kinetic energy is converted to potential energy. 
B)  potential energy is converted to kinetic energy. 
C)  energy is created. 
D)  energy is destroyed.

Question 6

Which of the following is a salt?

Accepted Answer

A)  NaOH 
B)  HOH 
C)  H2SO4 
D)  MgCl2 
A)  NaOH 
B)  HOH 
C)  H2SO4 
D)  MgCl2

Question 7

Which of the following is a base or alkaline material?

Accepted Answer

A)  NaOH 
B)  HCl 
C)  H2SO4 
D)  NaCl 
A)  NaOH 
B)  HCl 
C)  H2SO4 
D)  NaCl

Question 8

The higher the pH,

Accepted Answer

A)  the greater the hydroxide ion concentration. 
B)  the more acidic the solution. 
C)  the greater the hydrogen ion concentration. 
D)  the lower the pH number. 
A)  the greater the hydroxide ion concentration. 
B)  the more acidic the solution. 
C)  the greater the hydrogen ion concentration. 
D)  the lower the pH number.

Question 9

Which combination of elements is most likely to undergo a chemical reaction based on their positions in the Periodic Table of the Elements?

Accepted Answer

A)  Na and Cl 
B)  Na and Mg 
C)  F and Ne 
D)  All would react. 
A)  Na and Cl 
B)  Na and Mg 
C)  F and Ne 
D)  All would react.

Question 10

Which one of the following represents the correct mass, location, and charge of a proton?

Accepted Answer

A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4 
A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4

Question 11

Which of the following would have the smallest number of hydrogen ions (H+)?

Accepted Answer

A)  A solution with the pH 2 
B)  A solution with the pH 6 
C)  A container of acetic acid (vinegar) 
D)  A container of a strong base 
A)  A solution with the pH 2 
B)  A solution with the pH 6 
C)  A container of acetic acid (vinegar) 
D)  A container of a strong base

Question 12

Which of the following is an acid?

Accepted Answer

A)  K2SO4 
B)  NaNO3 
C)  CaCO3 
D)  H3PO4 
A)  K2SO4 
B)  NaNO3 
C)  CaCO3 
D)  H3PO4

Question 13

Comparing reactants to end products in the following chemical reaction, which end product will gain energy? Adenosine-tri-phosphate + sugar $\rightarrow$ adenosine-di-phosphate + sugar-mono-phosphate

Accepted Answer

A)  sugar-mono-phosphate 
B)  adenosine-di-phosphate 
C)  adenosine-tri-phosphate 
D)  None of these choices is correct. 
A)  sugar-mono-phosphate 
B)  adenosine-di-phosphate 
C)  adenosine-tri-phosphate 
D)  None of these choices is correct.

Question 14

An atom with twelve electrons, twelve protons, and fourteen neutrons has a mass number of

Accepted Answer

A)  fourteen. 
B)  twenty-four. 
C)  thirty-eight. 
D)  twenty-six. 
A)  fourteen. 
B)  twenty-four. 
C)  thirty-eight. 
D)  twenty-six.

Question 15

Why is the following reaction considered to be dehydration synthesis? H-NH3C2O-OH + H-NH3C2O-OH $\rightarrow$H-NH3C2O- NH3C2O-OH + H-OH

Accepted Answer

A)  Water molecules are hidden in the products H-NH3C2O-NH3C2O-OH. 
B)  This is the same reaction that occurs during digestion and water is required. 
C)  Water molecules are formed as a result of the breakdown of H-NH3C2O-NH3C2O-OH. 
D)  Water molecules are formed as a new, more complex end product is formed. 
A)  Water molecules are hidden in the products H-NH3C2O-NH3C2O-OH. 
B)  This is the same reaction that occurs during digestion and water is required. 
C)  Water molecules are formed as a result of the breakdown of H-NH3C2O-NH3C2O-OH. 
D)  Water molecules are formed as a new, more complex end product is formed.

Question 16

Which of the following is monatomic?

Accepted Answer

A)  He 
B)  H2 
C)  O2 
D)  N2 
A)  He 
B)  H2 
C)  O2 
D)  N2

Question 17

One atomic mass unit (AMU) approximately equals the mass of one

Accepted Answer

A)  proton. 
B)  electron. 
C)  nucleus. 
D)  proton plus the mass of one neutron. 
A)  proton. 
B)  electron. 
C)  nucleus. 
D)  proton plus the mass of one neutron.

Question 18

In which one of the following situations do the molecules have the greatest amount of energy?

Accepted Answer

A)  Ice in a Coke 
B)  Cold tap water 
C)  Water vapor 
D)  Water condensed on your windshield 
A)  Ice in a Coke 
B)  Cold tap water 
C)  Water vapor 
D)  Water condensed on your windshield

Question 19

In the expression 2H2S + 3O2 $\rightarrow$ 2H2O + SO2, which is the acid?

Accepted Answer

A)  H2S 
B)  O2 
C)  SO2 
D)  H2O 
A)  H2S 
B)  O2 
C)  SO2 
D)  H2O

Question 20

One molecule of sodium nitrate (NaNO3) contains ____ atoms.

Accepted Answer

A)  6 
B)  5 
C)  4 
D)  3 
A)  6 
B)  5 
C)  4 
D)  3

Exam 2: The Basics of Life: Chemistry

An acid is a substance that, in solution, releases

If a particular atom has 27 electrons, 27 protons, and 31 neutrons, its mass number would be

A substance that is a solid

The mass of a given volume of matter is expressed as

When a pencil falls from a tabletop to the floor

Which of the following is a salt?

Which of the following is a base or alkaline material?

The higher the pH,

Which combination of elements is most likely to undergo a chemical reaction based on their positions in the Periodic Table of the Elements?

Which one of the following represents the correct mass, location, and charge of a proton?

Which of the following would have the smallest number of hydrogen ions (H+)?

Which of the following is an acid?

Comparing reactants to end products in the following chemical reaction, which end product will gain energy? Adenosine-tri-phosphate + sugar →\rightarrow→ adenosine-di-phosphate + sugar-mono-phosphate

An atom with twelve electrons, twelve protons, and fourteen neutrons has a mass number of

Why is the following reaction considered to be dehydration synthesis? H-NH3C2O-OH + H-NH3C2O-OH →\rightarrow→ H-NH3C2O- NH3C2O-OH + H-OH

Which of the following is monatomic?

One atomic mass unit (AMU) approximately equals the mass of one

In which one of the following situations do the molecules have the greatest amount of energy?

In the expression 2H2S + 3O2 →\rightarrow→ 2H2O + SO2, which is the acid?

One molecule of sodium nitrate (NaNO3) contains ____ atoms.

What Is Biology

Organic Molecules: The Molecules of Life

Cell Structure and Function

Enzymes, Coenzymes, and Energy

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Ecosystem Dynamics: The Flow of Energy and Matter

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

The Bodys Control Mechanisms and Immunity

Human Reproduction, Sex, and Sexuality

Filters

Which of the following would have the smallest number of hydrogen ions (H⁺)?

Comparing reactants to end products in the following chemical reaction, which end product will gain energy? Adenosine-tri-phosphate + sugar $\rightarrow$ adenosine-di-phosphate + sugar-mono-phosphate

Why is the following reaction considered to be dehydration synthesis? H-NH₃C₂O-OH + H-NH₃C₂O-OH $\rightarrow$ H-NH₃C₂O- NH₃C₂O-OH + H-OH

In the expression 2H₂S + 3O₂ $\rightarrow$ 2H₂O + SO₂, which is the acid?

One molecule of sodium nitrate (NaNO₃) contains ____ atoms.