Question 1

In physical changes,the atoms or molecules that compose the matter do not change their identity,even though the matter may change its appearance.

Accepted Answer

A) True 
 B)False

Question 2

All of the following can be considered physical properties EXCEPT:

Accepted Answer

A) taste. 
B) color. 
C) flammability. 
D) density. 
E) boiling point. 
A) taste. 
B) color. 
C) flammability. 
D) density. 
E) boiling point.

Question 3

Matter can be destroyed in a combustion reaction (such as burning fuel).

Accepted Answer

A) True 
 B)False

Question 4

If a pure material decomposes when heated into simpler substances,this proves that the material was a compound.

Accepted Answer

A) True 
 B)False

Question 5

When a chemical "cold pack" is activated,the chemical reactants absorb heat from the surroundings.

Accepted Answer

A) True 
 B)False

Question 6

What is the specific heat (J/g∙°C)of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J?

Accepted Answer

A) 4.18 
B) 0.15 
C) 0.73 
D) 1.4 
E) none of the above 
A) 4.18 
B) 0.15 
C) 0.73 
D) 1.4 
E) none of the above

Question 7

Flammability of gasoline is a chemical property.

Accepted Answer

A) True 
 B)False

Question 8

Liquid and gas molecules can easily be compressed,while in a solid the molecules are incompressible.

Accepted Answer

A) True 
 B)False

Question 9

When a cold ice cube is dropped into a warm cup of water,energy is transferred as heat from the ice to the water.

Accepted Answer

A) True 
 B)False

Question 10

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

Accepted Answer

A) True 
 B)False

Question 11

Which state of matter has atomic spacing that is close together and definite shape?

Accepted Answer

A) liquid 
B) solid 
C) gas 
D) plasma 
E) none of the above 
A) liquid 
B) solid 
C) gas 
D) plasma 
E) none of the above

Question 12

Which of the following is NOT a technique that could be used to separate a mixture into its components?

Accepted Answer

A) stirring 
B) decanting 
C) filtration 
D) distillation 
E) none of the above 
A) stirring 
B) decanting 
C) filtration 
D) distillation 
E) none of the above

Question 13

Saltwater is a homogeneous mixture.

Accepted Answer

A) True 
 B)False

Question 14

How many joules are there in a 255 calorie snack bar?

Accepted Answer

A) 2.55 × 105 
B) 1.07 × 106 
C) 1.07 × 103 
D) 6.09 × 104 
E) none of the above 
A) 2.55 × 105 
B) 1.07 × 106 
C) 1.07 × 103 
D) 6.09 × 104 
E) none of the above

Question 15

A moving bowling ball has kinetic energy.

Accepted Answer

A) True 
 B)False

Question 16

The corrosion of iron is a physical change.

Accepted Answer

A) True 
 B)False

Question 17

If a particular process is endothermic,the reverse process must be a (an):

Accepted Answer

A) chemical change. 
B) isothermal process. 
C) exothermic process. 
D) endothermic process. 
E) none of the above 
A) chemical change. 
B) isothermal process. 
C) exothermic process. 
D) endothermic process. 
E) none of the above

Question 18

How much heat (kJ)is needed to raise the temperature of 100.0 grams of water from 25.0°C to   ?

Accepted Answer

A) 10450 
B) 0.598 
C) 1.05 
D) 10.5 
E) none of the above 
A) 10450 
B) 0.598 
C) 1.05 
D) 10.5 
E) none of the above

Question 19

How many kilojoules are there in 95.0 Calories?

Accepted Answer

A) 2.27 × 107 
B) 3.97 × 10-4 
C) 397 
D) 22.7 
E) none of the above 
A) 2.27 × 107 
B) 3.97 × 10-4 
C) 397 
D) 22.7 
E) none of the above

Question 20

Given the table of specific heat values below,what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed?

Accepted Answer

A) Fe 
B) Al 
C) Au 
D) Ag 
E) none of the above 
A) Fe 
B) Al 
C) Au 
D) Ag 
E) none of the above

In physical changes,the atoms or molecules that compose the matter do not change their identity,even though the matter may change its appearance.

All of the following can be considered physical properties EXCEPT:

Matter can be destroyed in a combustion reaction (such as burning fuel).

If a pure material decomposes when heated into simpler substances,this proves that the material was a compound.

When a chemical "cold pack" is activated,the chemical reactants absorb heat from the surroundings.

What is the specific heat (J/g∙°C)of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J?

Flammability of gasoline is a chemical property.

Liquid and gas molecules can easily be compressed,while in a solid the molecules are incompressible.

When a cold ice cube is dropped into a warm cup of water,energy is transferred as heat from the ice to the water.

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

Which state of matter has atomic spacing that is close together and definite shape?

Which of the following is NOT a technique that could be used to separate a mixture into its components?

Saltwater is a homogeneous mixture.

How many joules are there in a 255 calorie snack bar?

A moving bowling ball has kinetic energy.

The corrosion of iron is a physical change.

If a particular process is endothermic,the reverse process must be a (an):

How much heat (kJ)is needed to raise the temperature of 100.0 grams of water from 25.0°C to ?

How many kilojoules are there in 95.0 Calories?

Given the table of specific heat values below,what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed?

The Chemical World

Measurement and Problem Solving

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 3: Matter and Energy

In physical changes,the atoms or molecules that compose the matter do not change their identity,even though the matter may change its appearance.

All of the following can be considered physical properties EXCEPT:

Matter can be destroyed in a combustion reaction (such as burning fuel).

If a pure material decomposes when heated into simpler substances,this proves that the material was a compound.

When a chemical "cold pack" is activated,the chemical reactants absorb heat from the surroundings.

What is the specific heat (J/g∙°C)of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J?

Flammability of gasoline is a chemical property.

Liquid and gas molecules can easily be compressed,while in a solid the molecules are incompressible.

When a cold ice cube is dropped into a warm cup of water,energy is transferred as heat from the ice to the water.

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

Which state of matter has atomic spacing that is close together and definite shape?

Which of the following is NOT a technique that could be used to separate a mixture into its components?

Saltwater is a homogeneous mixture.

How many joules are there in a 255 calorie snack bar?

A moving bowling ball has kinetic energy.

The corrosion of iron is a physical change.

If a particular process is endothermic,the reverse process must be a (an):

How much heat (kJ)is needed to raise the temperature of 100.0 grams of water from 25.0°C to ?

How many kilojoules are there in 95.0 Calories?

Given the table of specific heat values below,what is the identity of a 26.2 g metal sample that increases by 8.5°C when 100.0 J of energy is absorbed?

The Chemical World

Measurement and Problem Solving

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters