Question 1

Which of the following is the best statement of the Law of Conservation of Mass?

Accepted Answer

A) In any non-nuclear change, energy is conserved 
B) In a chemical change, the mass of the reactants is always greater than or equal to the mass of the products 
C) In a chemical change, the mass of the products is always greater than or equal to the mass of the reactants 
D) For endothermic chemical reactions, the mass of the products is greater than the mass of the reactants, and for exothermic chemical reactions, the mass of the products is less than the mass of the reactants 
E) In a chemical change, mass is neither created nor destroyed 
A) In any non-nuclear change, energy is conserved 
B) In a chemical change, the mass of the reactants is always greater than or equal to the mass of the products 
C) In a chemical change, the mass of the products is always greater than or equal to the mass of the reactants 
D) For endothermic chemical reactions, the mass of the products is greater than the mass of the reactants, and for exothermic chemical reactions, the mass of the products is less than the mass of the reactants 
E) In a chemical change, mass is neither created nor destroyed

Question 2

Which of the following are elements?
i.KOH
ii.Ne
iii.CO
iv.Carbon tetrachloride
v.Calcium

Accepted Answer

A) i, ii, and iii 
B) iv and v 
C) ii and iii 
D) ii and v 
E) ii, iii, and v 
A) i, ii, and iii 
B) iv and v 
C) ii and iii 
D) ii and v 
E) ii, iii, and v

Question 3

When paper is burned,the mass of the remaining ash is less than the mass of the original paper.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Mass?

Accepted Answer

A) Some of the mass is converted into the heat energy evolved from burning 
B) When invisible substances are taken into account, the total mass of the reactants is equal to the total mass of the products 
C) The ash is more dense than the paper 
D) The different molecular structure of the ash causes it to appear to have less mass until it is compacted 
E) The mass of the ash cannot be accurately determined 
A) Some of the mass is converted into the heat energy evolved from burning 
B) When invisible substances are taken into account, the total mass of the reactants is equal to the total mass of the products 
C) The ash is more dense than the paper 
D) The different molecular structure of the ash causes it to appear to have less mass until it is compacted 
E) The mass of the ash cannot be accurately determined

Question 4

Which of the following correctly represents electrostatic forces?

Accepted Answer

A)    
B)    
C)    
D)    
E) All of the above are correct. 
A)    
B)    
C)    
D)    
E) All of the above are correct.

Question 5

Which of the following would be classified is a mixture of an element and a compound?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 6

Which of the following statements is false?

Accepted Answer

A) As a positively charged object moves toward a negatively charged object, their potential energy increases 
B) As a positively charged object moves toward another positively charged object, their potential energy increases 
C) As a negatively charged object moves toward another negatively charged object, their potential energy increases 
D) Increasing the distance between two electrically charged objects may raise or lower their potential energy 
E) All of the above are true 
A) As a positively charged object moves toward a negatively charged object, their potential energy increases 
B) As a positively charged object moves toward another positively charged object, their potential energy increases 
C) As a negatively charged object moves toward another negatively charged object, their potential energy increases 
D) Increasing the distance between two electrically charged objects may raise or lower their potential energy 
E) All of the above are true

Question 7

Which of the following properties is/are classified as chemical?
i.The taste of honey
ii.The ability of hair to stretch
iii.The corrosive character of hydrochloric acid
iv.The combustibility of ethanol
v.The softness of talc

Accepted Answer

A) i and ii 
B) i, ii, and v 
C) iii only 
D) iv only 
E) iii and iv 
A) i and ii 
B) i, ii, and v 
C) iii only 
D) iv only 
E) iii and iv

Question 8

Consider the particulate-level illustration:   Which is the best classification of this particle-level illustration?

Accepted Answer

A) Molecule 
B) Element 
C) Solid 
D) Crystalline solid 
E) Atom 
A) Molecule 
B) Element 
C) Solid 
D) Crystalline solid 
E) Atom

Question 9

Which of the following changes is/are exothermic for the underlined object?
i.ice melts
ii.hot french fries cool
iii.a beaker warms as chemicals react within it
iv.a hot plate warms a beaker of water
v.water evaporates off of skin

Accepted Answer

A) iii and iv 
B) i and v 
C) ii only 
D) All are exothermic 
E) None is exothermic 
A) iii and iv 
B) i and v 
C) ii only 
D) All are exothermic 
E) None is exothermic

Question 10

Consider the following image.   Which of the following most accurately describes the change represented in the image?

Accepted Answer

A) A chemical change which follows conservation of mass. 
B) A physical change which does not follow conservation of mass. 
C) A physical change which follows conservation of mass. 
D) A chemical change which does not follow conservation of mass. 
A) A chemical change which follows conservation of mass. 
B) A physical change which does not follow conservation of mass. 
C) A physical change which follows conservation of mass. 
D) A chemical change which does not follow conservation of mass.

Which of the following is the best statement of the Law of Conservation of Mass?

Which of the following are elements? i.KOH ii.Ne iii.CO iv.Carbon tetrachloride v.Calcium

When paper is burned,the mass of the remaining ash is less than the mass of the original paper.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Mass?

Which of the following correctly represents electrostatic forces?

Which of the following would be classified is a mixture of an element and a compound?

Which of the following statements is false?

Which of the following properties is/are classified as chemical? i.The taste of honey ii.The ability of hair to stretch iii.The corrosive character of hydrochloric acid iv.The combustibility of ethanol v.The softness of talc

Consider the particulate-level illustration: Which is the best classification of this particle-level illustration?

Which of the following changes is/are exothermic for the underlined object? i.ice melts ii.hot french fries cool iii.a beaker warms as chemicals react within it iv.a hot plate warms a beaker of water v.water evaporates off of skin

Consider the following image. Which of the following most accurately describes the change represented in the image?

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 2: Matter and Energy

Which of the following is the best statement of the Law of Conservation of Mass?

Which of the following are elements? i.KOH ii.Ne iii.CO iv.Carbon tetrachloride v.Calcium

When paper is burned,the mass of the remaining ash is less than the mass of the original paper.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Mass?

Which of the following correctly represents electrostatic forces?

Which of the following would be classified is a mixture of an element and a compound?

Which of the following statements is false?

Which of the following properties is/are classified as chemical? i.The taste of honey ii.The ability of hair to stretch iii.The corrosive character of hydrochloric acid iv.The combustibility of ethanol v.The softness of talc

Consider the particulate-level illustration: Which is the best classification of this particle-level illustration?

Which of the following changes is/are exothermic for the underlined object? i.ice melts ii.hot french fries cool iii.a beaker warms as chemicals react within it iv.a hot plate warms a beaker of water v.water evaporates off of skin

Consider the following image. Which of the following most accurately describes the change represented in the image?

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters