Question 1

The nutritional calorie (Cal) is the same as __________ cal.

Accepted Answer

The answer of The nutritional calorie (Cal) is the same...

Question 2

Absolute zero is

Accepted Answer

A)  the freezing point of water using the Celsius scale. 
B)  the boiling point of liquid nitrogen. 
C)  the temperature on the Kelvin scale corresponding to 32 °F. 
D)  the coldest temperature possible. 
E)  the freezing point of liquid nitrogen. 
A)  the freezing point of water using the Celsius scale. 
B)  the boiling point of liquid nitrogen. 
C)  the temperature on the Kelvin scale corresponding to 32 °F. 
D)  the coldest temperature possible. 
E)  the freezing point of liquid nitrogen.

Question 3

The energy associated with the motion of particles in a substance is called

Accepted Answer

A)  temperature. 
B)  electrical energy. 
C)  heat. 
D)  chemical energy. 
E)  potential energy. 
A)  temperature. 
B)  electrical energy. 
C)  heat. 
D)  chemical energy. 
E)  potential energy.

Question 4

650. J is the same amount of energy as

Accepted Answer

A)  155 cal 
B)  2720 cal 
C)  650 cal 
D)  1550 cal 
E)  2.72 cal 
A)  155 cal 
B)  2720 cal 
C)  650 cal 
D)  1550 cal 
E)  2.72 cal

Question 5

The change of state from solid to gas is termed __________.

Accepted Answer

The answer of The change of state from solid to...

Question 6

The units of specific heat are __________.

Accepted Answer

The answer of The units of specific heat are __________....

Question 7

Match the state of matter with each of the following descriptions of a substance.
-Particles are held close together in a random pattern.

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 8

Identify each of the following transformations as a chemical or physical change 
-This substance is melting.

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 9

How many calories are required to raise the temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C.

Accepted Answer

A)  38 cal 
B)  1.1 cal 
C)  3.8 cal 
D)  93 cal 
E)  130 cal 
A)  38 cal 
B)  1.1 cal 
C)  3.8 cal 
D)  93 cal 
E)  130 cal

Question 10

The lowest temperature on the Kelvin scale is __________ kelvin.

Accepted Answer

The answer of The lowest temperature on the Kelvin scale...

Question 11

Molecules of a gas are very close together.

Accepted Answer

A) True 
 B)False

Question 12

Coins in a piggy bank is a(n)

Accepted Answer

A)  compound. 
B)  heterogeneous mixture. 
C)  element. 
D)  homogeneous mixture. 
E)  None of the above. 
A)  compound. 
B)  heterogeneous mixture. 
C)  element. 
D)  homogeneous mixture. 
E)  None of the above.

Question 13

If the temperature is 20 °C, what is the corresponding temperature on the Fahrenheit scale?

Accepted Answer

A)  -22 °F 
B)  68 °F 
C)  43 °F 
D)  239 °F 
E)  94 °F 
A)  -22 °F 
B)  68 °F 
C)  43 °F 
D)  239 °F 
E)  94 °F

Question 14

3.25 kcal is the same amount of energy as

Accepted Answer

A)  3.25 J 
B)  0.777 J 
C)  777 J 
D)  13600 J 
E)  13.6 J 
A)  3.25 J 
B)  0.777 J 
C)  777 J 
D)  13600 J 
E)  13.6 J

Question 15

Will the caloric value of a 100.g hamburger be higher or lower than the caloric value of 100. g of cooking oil?

Accepted Answer

The answer of Will the caloric value of a 100.g...

Question 16

A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

Accepted Answer

A)  14 kcal/g 
B)  11 kcal/g 
C)  0.14 kcal/g 
D)  4.2 kcal/g 
E)  5.4 kcal/g 
A)  14 kcal/g 
B)  11 kcal/g 
C)  0.14 kcal/g 
D)  4.2 kcal/g 
E)  5.4 kcal/g

Question 17

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.
-70 °C

Accepted Answer

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

Question 18

Identify each of the following transformations as a chemical or physical change 
-burning leaves

Accepted Answer

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

Question 19

A serving of fish contains 50 g of protein and 4 g of fat. If protein has a caloric value of 4.0 kcal/g and fat has 9.1 kcal/g, how many kcal are in the serving? Report the answer to 2 significant figures.

Accepted Answer

A)  240 kcal 
B)  54.0 kcal 
C)  470 kcal 
D)  220 kcal 
E)  490 kcal 
A)  240 kcal 
B)  54.0 kcal 
C)  470 kcal 
D)  220 kcal 
E)  490 kcal

Question 20

Helium is a(n)

Accepted Answer

A)  compound. 
B)  heterogeneous mixture. 
C)  element. 
D)  homogeneous mixture. 
E)  electron. 
A)  compound. 
B)  heterogeneous mixture. 
C)  element. 
D)  homogeneous mixture. 
E)  electron.

Exam 2: Energy and Matter

The nutritional calorie (Cal) is the same as __________ cal.

Absolute zero is

The energy associated with the motion of particles in a substance is called

650. J is the same amount of energy as

The change of state from solid to gas is termed __________.

The units of specific heat are __________.

Match the state of matter with each of the following descriptions of a substance. -Particles are held close together in a random pattern.

Identify each of the following transformations as a chemical or physical change -This substance is melting.

How many calories are required to raise the temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C.

The lowest temperature on the Kelvin scale is __________ kelvin.

Molecules of a gas are very close together.

Coins in a piggy bank is a(n)

If the temperature is 20 °C, what is the corresponding temperature on the Fahrenheit scale?

3.25 kcal is the same amount of energy as

Will the caloric value of a 100.g hamburger be higher or lower than the caloric value of 100. g of cooking oil?

A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

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. -70 °C

Identify each of the following transformations as a chemical or physical change -burning leaves

A serving of fish contains 50 g of protein and 4 g of fat. If protein has a caloric value of 4.0 kcal/g and fat has 9.1 kcal/g, how many kcal are in the serving? Report the answer to 2 significant figures.

Helium is a(n)

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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