Question 1

Identify each of the following transformations as a chemical or physical change 
-silver tarnishing

Accepted Answer

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

Question 2

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as

Accepted Answer

A)  evaporation. 
B)  deposition. 
C)  boiling. 
D)  melting. 
E)  sublimation. 
A)  evaporation. 
B)  deposition. 
C)  boiling. 
D)  melting. 
E)  sublimation.

Question 3

A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat. If the pizza contains 280 kcal, how many grams of fat are present? Report the answer to 2 significant figures.

Accepted Answer

A)  10. g 
B)  12 g 
C)  25 g 
D)  55 g 
E)  250 g 
A)  10. g 
B)  12 g 
C)  25 g 
D)  55 g 
E)  250 g

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.
--15 °C

Accepted Answer

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

Question 5

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.
-60 °C

Accepted Answer

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

Question 6

When a liquid is boiling, its temperature does not change.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is an example of potential energy?

Accepted Answer

A)  chewing food 
B)  water stored in a reservoir 
C)  burning wood 
D)  a fan blade turning 
E)  riding an exercise bike 
A)  chewing food 
B)  water stored in a reservoir 
C)  burning wood 
D)  a fan blade turning 
E)  riding an exercise bike

Question 8

Which of the following is a physical change?

Accepted Answer

A)  baking a cake 
B)  dry ice subliming 
C)  fermenting grapes to produce wine 
D)  digesting a meal 
E)  a tomato ripening 
A)  baking a cake 
B)  dry ice subliming 
C)  fermenting grapes to produce wine 
D)  digesting a meal 
E)  a tomato ripening

Question 9

Condensation occurs when a liquid is converted to a solid.

Accepted Answer

A) True 
 B)False

Question 10

Raising the temperature of 10.0 g of water from 10.0 °C to 20.0 °C requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0 °C to 20.0 °C requires 22 cal. More calories are required to heat the water because

Accepted Answer

A)  water is a liquid and aluminum is a solid at 10.0 °C. 
B)  ten grams of water occupies a larger volume than 10.0 g of aluminum. 
C)  water has a greater potential energy than aluminum. 
D)  water has a larger specific heat than aluminum. 
E)  10.0 °C is closer to the melting point of water than to the melting point of aluminum. 
A)  water is a liquid and aluminum is a solid at 10.0 °C. 
B)  ten grams of water occupies a larger volume than 10.0 g of aluminum. 
C)  water has a greater potential energy than aluminum. 
D)  water has a larger specific heat than aluminum. 
E)  10.0 °C is closer to the melting point of water than to the melting point of aluminum.

Question 11

The temperature at which water melts and freezes is the same.

Accepted Answer

A) True 
 B)False

Question 12

A diet has a total caloric intake of 1400 kcal. The diet consists of 50.% carbohydrate, 35% protein, and 15% fat. The number of kcal of protein in the diet is

Accepted Answer

A)  700 kcal. 
B)  490 kcal. 
C)  210 kcal. 
D)  460 kcal. 
E)  1200 kcal. 
A)  700 kcal. 
B)  490 kcal. 
C)  210 kcal. 
D)  460 kcal. 
E)  1200 kcal.

Question 13

A temperature of 41 °F is the same as

Accepted Answer

A)  5 °C. 
B)  310 °C. 
C)  -9 °C. 
D)  16 °C. 
E)  42 °C. 
A)  5 °C. 
B)  310 °C. 
C)  -9 °C. 
D)  16 °C. 
E)  42 °C.

Question 14

Match the state of matter with each of the following descriptions of a substance.
-Great distances exist between the particles.

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 15

In which of the following would the particles move most rapidly?

Accepted Answer

A)  ice at -20 °C 
B)  water at 20 °C 
C)  steam at 110 °C 
D)  boiling water 
E)  ice at 0 °C 
A)  ice at -20 °C 
B)  water at 20 °C 
C)  steam at 110 °C 
D)  boiling water 
E)  ice at 0 °C

Question 16

The specific heat of a substance is the amount of heat needed to

Accepted Answer

A)  change 1 g of the substance from the solid to the liquid state. 
B)  raise the temperature of 1 g of the substance by 1 °C. 
C)  change 1 g of the substance from the liquid to the solid state. 
D)  convert 1 g of a liquid to gas. 
E)  convert 1 g of a solid to a gas. 
A)  change 1 g of the substance from the solid to the liquid state. 
B)  raise the temperature of 1 g of the substance by 1 °C. 
C)  change 1 g of the substance from the liquid to the solid state. 
D)  convert 1 g of a liquid to gas. 
E)  convert 1 g of a solid to a gas.

Question 17

The energy of motion is called __________ energy.

Accepted Answer

The answer of The energy of motion is called __________...

Question 18

Which of the following does NOT represent a step on the heating curve of water?

Accepted Answer

A)  The temperature of steam cannot exceed 100 °C. 
B)  The temperature of ice remains at 0 °C as it melts. 
C)  The temperature of liquid water increases linearly as it is heated. 
D)  The temperature of liquid water remains at 100 °C as it boils. 
E)  Both liquid water and ice are present at 0 °C. 
A)  The temperature of steam cannot exceed 100 °C. 
B)  The temperature of ice remains at 0 °C as it melts. 
C)  The temperature of liquid water increases linearly as it is heated. 
D)  The temperature of liquid water remains at 100 °C as it boils. 
E)  Both liquid water and ice are present at 0 °C.

Question 19

One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain?

Accepted Answer

A)  60 kcal 
B)  88 kcal 
C)  230 kcal 
D)  240 kcal 
E)  520 kcal 
A)  60 kcal 
B)  88 kcal 
C)  230 kcal 
D)  240 kcal 
E)  520 kcal

Question 20

A mixture which has uniform properties is a __________ mixture.

Accepted Answer

The answer of A mixture which has uniform properties is...

Exam 2: Energy and Matter

Identify each of the following transformations as a chemical or physical change -silver tarnishing

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as

A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat. If the pizza contains 280 kcal, how many grams of fat are present? Report the answer to 2 significant figures.

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. --15 °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. -60 °C

When a liquid is boiling, its temperature does not change.

Which of the following is an example of potential energy?

Which of the following is a physical change?

Condensation occurs when a liquid is converted to a solid.

Raising the temperature of 10.0 g of water from 10.0 °C to 20.0 °C requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0 °C to 20.0 °C requires 22 cal. More calories are required to heat the water because

The temperature at which water melts and freezes is the same.

A diet has a total caloric intake of 1400 kcal. The diet consists of 50.% carbohydrate, 35% protein, and 15% fat. The number of kcal of protein in the diet is

A temperature of 41 °F is the same as

Match the state of matter with each of the following descriptions of a substance. -Great distances exist between the particles.

In which of the following would the particles move most rapidly?

The specific heat of a substance is the amount of heat needed to

The energy of motion is called __________ energy.

Which of the following does NOT represent a step on the heating curve of water?

One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain?

A mixture which has uniform properties is a __________ mixture.

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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