Question 1

An example of a chemical change is browning of meat.

Accepted Answer

A) True 
 B)False

Question 2

Most molecules have dimensions in the nanometer (nm) or ________ range.

Accepted Answer

A)  centimeter (cm) 
B)  millimeter (mm) 
C)  kilometer (km) 
D)  picometer (pm) 
A)  centimeter (cm) 
B)  millimeter (mm) 
C)  kilometer (km) 
D)  picometer (pm)

Question 3

The evaluation of societal risk includes all of the components of individual risk plus

Accepted Answer

A)  the probability that an incident will occur. 
B)  the degree of severity of the incident. 
C)  the number of people affected by the incident. 
D)  the benefit associated with the incident. 
A)  the probability that an incident will occur. 
B)  the degree of severity of the incident. 
C)  the number of people affected by the incident. 
D)  the benefit associated with the incident.

Question 4

Mass is ________ no "matter" where you are in the universe.

Accepted Answer

constant (

Question 5

The species represented by CO is

Accepted Answer

A)  an atom of cobalt. 
B)  an atom made up of carbon and oxygen. 
C)  a molecule of cobalt. 
D)  a molecule made up of carbon and oxygen. 
A)  an atom of cobalt. 
B)  an atom made up of carbon and oxygen. 
C)  a molecule of cobalt. 
D)  a molecule made up of carbon and oxygen.

Question 6

Which of the following is NOT true for a scientific law?

Accepted Answer

A)  It summarizes observed scientific data. 
B)  It is often stated in mathematical terms. 
C)  It explains observed scientific data. 
D)  It is universal and will hold everywhere under the stated conditions. 
A)  It summarizes observed scientific data. 
B)  It is often stated in mathematical terms. 
C)  It explains observed scientific data. 
D)  It is universal and will hold everywhere under the stated conditions.

Question 7

What is the name of the element with the symbol Ag?

Accepted Answer

A)  silver 
B)  gold 
C)  mercury 
D)  antimony 
A)  silver 
B)  gold 
C)  mercury 
D)  antimony

Question 8

Kim Chemist proposes that increasing the proportion of butadiene in her glue formulation will make the glue stickier. Her proposal is called a(n)

Accepted Answer

A)  theory. 
B)  experiment. 
C)  law. 
D)  hypothesis. 
A)  theory. 
B)  experiment. 
C)  law. 
D)  hypothesis.

Question 9

MRI

Accepted Answer

A)  is a noninvasive diagnostic technique. 
B)  is nuclear magnetic resonance imaging scans of the human body. 
C)  has replaced many exploratory surgical operations. 
D)  all of the above 
A)  is a noninvasive diagnostic technique. 
B)  is nuclear magnetic resonance imaging scans of the human body. 
C)  has replaced many exploratory surgical operations. 
D)  all of the above

Question 10

An example of a physical change is a gas becoming a liquid.

Accepted Answer

A) True 
 B)False

Question 11

What is the chemical symbol for iron?

Accepted Answer

A)  Fe 
B)  I 
C)  In 
D)  Ir 
A)  Fe 
B)  I 
C)  In 
D)  Ir

Question 12

New technologies provide current benefits, but often present future risks.

Accepted Answer

A) True 
 B)False

Question 13

In order for an experiment to be successful, scientists must be able to control all variables.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements about chemistry is NOT true?

Accepted Answer

A)  Chemistry is an important component of the economy of the United States. 
B)  Chemistry affects every area of our daily lives. 
C)  Chemical products account for 10% of U.S. exports every year. 
D)  All of the above are true. 
A)  Chemistry is an important component of the economy of the United States. 
B)  Chemistry affects every area of our daily lives. 
C)  Chemical products account for 10% of U.S. exports every year. 
D)  All of the above are true.

Question 15

Which of the following is a physical change?

Accepted Answer

A)  Carbon combines with oxygen to form carbon dioxide. 
B)  Ice melts at 0°C. 
C)  A red substance is decomposed by heat to form mercury and oxygen. 
D)  Water is decomposed by electricity into hydrogen and oxygen. 
A)  Carbon combines with oxygen to form carbon dioxide. 
B)  Ice melts at 0°C. 
C)  A red substance is decomposed by heat to form mercury and oxygen. 
D)  Water is decomposed by electricity into hydrogen and oxygen.

Question 16

Chemistry is

Accepted Answer

A)  the mystical search for the elixir of life. 
B)  the study of matter and the changes it undergoes. 
C)  speculation about the nature of matter. 
D)  none of these 
A)  the mystical search for the elixir of life. 
B)  the study of matter and the changes it undergoes. 
C)  speculation about the nature of matter. 
D)  none of these

Question 17

Vinegar is composed of approximately 5% acetic acid and 95% water. Which one of the following is the best classification of vinegar?

Accepted Answer

A)  pure substance 
B)  element 
C)  compound 
D)  mixture 
A)  pure substance 
B)  element 
C)  compound 
D)  mixture

Question 18

Briefly describe the central role of chemistry in science. Use an example.

Accepted Answer

The central role of chemistry in science

Question 19

Joe conducts an experiment to test the effectiveness of a new drug for cancer. Which of the following variables would be easiest to control?

Accepted Answer

A)  amount of drug administered 
B)  patient's diet 
C)  exposure to air pollution 
D)  exposure to other people 
A)  amount of drug administered 
B)  patient's diet 
C)  exposure to air pollution 
D)  exposure to other people

Question 20

The melting point of fluorine, F, is -220°C. What is this temperature on the Kelvin scale?

Accepted Answer

A)  320 K 
B)  120 K 
C)  493 K 
D)  53 K 
A)  320 K 
B)  120 K 
C)  493 K 
D)  53 K

Exam 1: Chemistry

An example of a chemical change is browning of meat.

Most molecules have dimensions in the nanometer (nm) or ________ range.

The evaluation of societal risk includes all of the components of individual risk plus

Mass is ________ no "matter" where you are in the universe.

The species represented by CO is

Which of the following is NOT true for a scientific law?

What is the name of the element with the symbol Ag?

Kim Chemist proposes that increasing the proportion of butadiene in her glue formulation will make the glue stickier. Her proposal is called a(n)

MRI

An example of a physical change is a gas becoming a liquid.

What is the chemical symbol for iron?

New technologies provide current benefits, but often present future risks.

In order for an experiment to be successful, scientists must be able to control all variables.

Which of the following statements about chemistry is NOT true?

Which of the following is a physical change?

Chemistry is

Vinegar is composed of approximately 5% acetic acid and 95% water. Which one of the following is the best classification of vinegar?

Briefly describe the central role of chemistry in science. Use an example.

Joe conducts an experiment to test the effectiveness of a new drug for cancer. Which of the following variables would be easiest to control?

The melting point of fluorine, F, is -220°C. What is this temperature on the Kelvin scale?

Atoms

Atomic Structure

Chemical Bonds

Chemical Accounting

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Oxidation and Reduction

Organic Chemistry

Polymers

Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters