Question 1

Which of the following would NOT be a physical change?

Accepted Answer

A)  freezing water to make ice cubes 
B)  tearing a piece of aluminum foil 
C)  boiling water for soup 
D)  burning gasoline in a lawnmower 
E)  melting gold to make jewelry 
A)  freezing water to make ice cubes 
B)  tearing a piece of aluminum foil 
C)  boiling water for soup 
D)  burning gasoline in a lawnmower 
E)  melting gold to make jewelry

Question 2

A burn from steam at 100 °C is expected to be more severe than a burn from boiling water at 100 °C because

Accepted Answer

A)  the steam is hotter than the boiling water. 
B)  there is more steam than water. 
C)  the steam will give off a large amount of heat as it condenses. 
D)  you are more likely to come into contact with the steam than with the boiling water. 
E)  All of these answers are correct. 
A)  the steam is hotter than the boiling water. 
B)  there is more steam than water. 
C)  the steam will give off a large amount of heat as it condenses. 
D)  you are more likely to come into contact with the steam than with the boiling water. 
E)  All of these answers are correct.

Question 3

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C.
Indicate the state or change of state occurring at each temperature.
-30 °C

Accepted Answer

The answer of Bromine (Br₂) has a freezing point of...

Question 4

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C.
Indicate the state or change of state occurring at each temperature.
--7 °C

Accepted Answer

The answer of Bromine (Br₂) has a freezing point of...

Question 5

Match the state of matter with each of the following descriptions of a substance.
-This material has a definite volume, and a definite shape.

Accepted Answer

A) solid 
B) liquid 
C) solid + liquid 
D) liquid + gas 
E) gas 
A) solid 
B) liquid 
C) solid + liquid 
D) liquid + gas 
E) gas

Question 6

A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.) Report the answer to 2 significant figures.

Accepted Answer

A)  70. kcal 
B)  360 kcal 
C)  17 kcal 
D)  630 kcal 
E)  280 kcal 
A)  70. kcal 
B)  360 kcal 
C)  17 kcal 
D)  630 kcal 
E)  280 kcal

Question 7

On a hot day, the thermometer read 95 °F. What is the temperature in degrees Celsius?

Accepted Answer

A)  77 °C 
B)  113 °C 
C)  35 °C 
D)  63 °C 
E)  178 °C 
A)  77 °C 
B)  113 °C 
C)  35 °C 
D)  63 °C 
E)  178 °C

Question 8

Identify the physical state(s) corresponding to the regions on the cooling curve below.

-B
A) solid and gas
B) liquid and gas
C) gas
D) liquid and solid
E) solid
F) liquid

Accepted Answer

The answer of Identify the physical state(s) corresponding to the...

Question 9

Which one of the following properties describes a liquid?

Accepted Answer

A)  has its own shape 
B)  particles are close together and move randomly 
C)  particles move very rapidly 
D)  fills the entire volume of the container 
E)  There is essentially no interaction between the particles. 
A)  has its own shape 
B)  particles are close together and move randomly 
C)  particles move very rapidly 
D)  fills the entire volume of the container 
E)  There is essentially no interaction between the particles.

Question 10

The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C. If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

Accepted Answer

A)  The copper will reach a higher temperature. 
B)  The silver will reach a higher temperature. 
C)  The two samples will reach the same temperature. 
D)  The copper will reach a temperature lower than 25 °C. 
E)  The silver will soften. 
A)  The copper will reach a higher temperature. 
B)  The silver will reach a higher temperature. 
C)  The two samples will reach the same temperature. 
D)  The copper will reach a temperature lower than 25 °C. 
E)  The silver will soften.

Question 11

In a gas, the distance between the particles is

Accepted Answer

A)  very close relative to the size of the molecules. 
B)  close relative to the size of the molecules. 
C)  fixed relative to the size of the molecules. 
D)  small relative to the size of the molecules. 
E)  very large relative to the size of the molecules. 
A)  very close relative to the size of the molecules. 
B)  close relative to the size of the molecules. 
C)  fixed relative to the size of the molecules. 
D)  small relative to the size of the molecules. 
E)  very large relative to the size of the molecules.

Question 12

Which of the following is a property of a solid?

Accepted Answer

A)  It takes the shape of the container. 
B)  It fills the volume of the container. 
C)  The particles move at a rapid rate. 
D)  The interactions between its particles are very weak. 
E)  The particles have fixed positions and are very close together. 
A)  It takes the shape of the container. 
B)  It fills the volume of the container. 
C)  The particles move at a rapid rate. 
D)  The interactions between its particles are very weak. 
E)  The particles have fixed positions and are very close together.

Question 13

The energy stored in the chemical bonds of a carbohydrate molecule is

Accepted Answer

A)  specific heat. 
B)  kinetic energy. 
C)  potential energy. 
D)  work. 
E)  a calorie. 
A)  specific heat. 
B)  kinetic energy. 
C)  potential energy. 
D)  work. 
E)  a calorie.

Question 14

If the temperature is - 55 °C, what is the corresponding temperature on the Kelvin scale?

Accepted Answer

A)  225 K 
B)  218 K 
C)  55 K 
D)  273 K 
E)  328 K 
A)  225 K 
B)  218 K 
C)  55 K 
D)  273 K 
E)  328 K

Question 15

The simplest type of pure substance is an __________.

Accepted Answer

The answer of The simplest type of pure substance is...

Question 16

Identify each of the following transformations as a chemical or physical change 
-baking a cake

Accepted Answer

A) physical 
B) chemical 
A) physical 
B) chemical

Question 17

The number of calories needed to raise the temperature of 32 g of water from 12 °C to 54 °C is

Accepted Answer

A)  384 cal. 
B)  1.3 cal. 
C)  1300 cal. 
D)  1700 cal. 
E)  0.76 cal. 
A)  384 cal. 
B)  1.3 cal. 
C)  1300 cal. 
D)  1700 cal. 
E)  0.76 cal.

Question 18

A kilocalorie of heat is required to raise the temperature of

Accepted Answer

A)  1 g of water from 14 °C to 15 °C. 
B)  1 g of water by 10 °C. 
C)  10 g of water by 10 °C. 
D)  100 g of water by 10 °C. 
E)  100 g of water by 100 °C. 
A)  1 g of water from 14 °C to 15 °C. 
B)  1 g of water by 10 °C. 
C)  10 g of water by 10 °C. 
D)  100 g of water by 10 °C. 
E)  100 g of water by 100 °C.

Question 19

Identify each of the following transformations as a chemical or physical change 
-placing photographs in a scrapbook

Accepted Answer

A) physical 
B) chemical 
A) physical 
B) chemical

Question 20

Identify the physical state(s) corresponding to the regions on the cooling curve below.

-E
A) solid and gas
B) liquid and gas
C) gas
D) liquid and solid
E) solid
F) liquid

Accepted Answer

The answer of Identify the physical state(s) corresponding to the...

Exam 2: Energy and Matter

Which of the following would NOT be a physical change?

A burn from steam at 100 °C is expected to be more severe than a burn from boiling water at 100 °C because

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. -30 °C

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. --7 °C

Match the state of matter with each of the following descriptions of a substance. -This material has a definite volume, and a definite shape.

On a hot day, the thermometer read 95 °F. What is the temperature in degrees Celsius?

Identify the physical state(s) corresponding to the regions on the cooling curve below. -B A) solid and gas B) liquid and gas C) gas D) liquid and solid E) solid F) liquid

Which one of the following properties describes a liquid?

The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C. If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

In a gas, the distance between the particles is

Which of the following is a property of a solid?

The energy stored in the chemical bonds of a carbohydrate molecule is

If the temperature is - 55 °C, what is the corresponding temperature on the Kelvin scale?

The simplest type of pure substance is an __________.

Identify each of the following transformations as a chemical or physical change -baking a cake

The number of calories needed to raise the temperature of 32 g of water from 12 °C to 54 °C is

A kilocalorie of heat is required to raise the temperature of

Identify each of the following transformations as a chemical or physical change -placing photographs in a scrapbook

Identify the physical state(s) corresponding to the regions on the cooling curve below. -E A) solid and gas B) liquid and gas C) gas D) liquid and solid E) solid F) liquid

Chemistry and Measurements

Atoms and Elements

Nuclear Chemistry

Compounds and Their Bonds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Phenols, Thiols, and Ethers

Aldehydes, Ketones, and Chiral Molecules

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

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