Question 1

Which of the following is a property of both gases and liquids?

Accepted Answer

A)  definite shape 
B)  indefinite shape 
C)  definite volume 
D)  indefinite volume 
A)  definite shape 
B)  indefinite shape 
C)  definite volume 
D)  indefinite volume

Question 2

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) Temperature and pressure are the only major factors that determine the state of matter (solid, liquid, gas) observed for a particular substance.
(2) The components of a mixture maintain their identity if the mixture is heterogeneous but lose their identity if the mixture is homogeneous.
(3) No more than six atoms may be present in a heteroatomic molecule.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 3

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) The first letter in a chemical symbol is always the same as the first letter in the element's name.
(2) Two element's account for over 75 percent of the atoms in the Earth's crust.
(3) The limit of chemical subdivision for a compound is a molecule.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 4

Which of the following changes is a chemical change?

Accepted Answer

A)  melting of ice 
B)  pulverizing of hard sugar cubes 
C)  rusting of iron 
D)  more than one correct response 
E)  no correct response 
A)  melting of ice 
B)  pulverizing of hard sugar cubes 
C)  rusting of iron 
D)  more than one correct response 
E)  no correct response

Question 5

The description "two substances present, two phases present" is correct for

Accepted Answer

A)  a mixture of ice and water 
B)  a mixture of oil and water 
C)  a mixture of milk and water 
D)  more than one correct response 
E)  no correct response 
A)  a mixture of ice and water 
B)  a mixture of oil and water 
C)  a mixture of milk and water 
D)  more than one correct response 
E)  no correct response

Question 6

Which of the following statements concerning pure substances is correct?

Accepted Answer

A)  Elements, but not compounds, are pure substances. 
B)  A pure substance can never be separated into simpler pure substances using chemical means. 
C)  Pure substances cannot have a variable composition. 
D)  more than one correct response 
E)  no correct response 
A)  Elements, but not compounds, are pure substances. 
B)  A pure substance can never be separated into simpler pure substances using chemical means. 
C)  Pure substances cannot have a variable composition. 
D)  more than one correct response 
E)  no correct response

Question 7

In which of the following pairs of chemical formulas do both members of the pair have the same number of atoms per molecule?

Accepted Answer

A)  NaSCN and H2CO3 
B)  CoCl2 and COCl2 
C)  H3N and NH3 
D)  more than one correct response 
E)  no correct response 
A)  NaSCN and H2CO3 
B)  CoCl2 and COCl2 
C)  H3N and NH3 
D)  more than one correct response 
E)  no correct response

Question 8

The total number of atoms present in one formula unit of Co2(SO4)3 is

Accepted Answer

A)  14 
B)  15 
C)  16 
D)  17 
A)  14 
B)  15 
C)  16 
D)  17

Question 9

In which of the following sequences of chemical formulas do all members of the sequence fit the description "heteroatomic and triatomic"?

Accepted Answer

A)  HCN, H2O and O3 
B)  CO2, NO2 and N2O 
C)  S2O, SO2, and SO3 
D)  more than one correct response 
E)  no correct response 
A)  HCN, H2O and O3 
B)  CO2, NO2 and N2O 
C)  S2O, SO2, and SO3 
D)  more than one correct response 
E)  no correct response

Question 10

A substance is melted. Choose the appropriate classification from the response list below:

Accepted Answer

A)  could be an element or a compound 
B)  could be an element but not a compound 
C)  could be a compound but not an element 
D)  could not be an element nor a compound 
A)  could be an element or a compound 
B)  could be an element but not a compound 
C)  could be a compound but not an element 
D)  could not be an element nor a compound

Question 11

In which of the following pairs of chemical formulas do both formulas represent compounds?

Accepted Answer

A)  O2 and O3 
B)  CO2 and O2 
C)  HCN and N2 
D)  N2O4 and NO2 
A)  O2 and O3 
B)  CO2 and O2 
C)  HCN and N2 
D)  N2O4 and NO2

Question 12

Give the classification of matter when two substances exist with two phases present

Accepted Answer

A)  heterogeneous mixture 
B)  homogeneous mixture 
C)  compound 
D)  element 
A)  heterogeneous mixture 
B)  homogeneous mixture 
C)  compound 
D)  element

Question 13

The description "two substances present, two phases present" is correct for

Accepted Answer

A)  heterogeneous mixtures 
B)  homogeneous mixtures 
C)  elements 
D)  compounds 
A)  heterogeneous mixtures 
B)  homogeneous mixtures 
C)  elements 
D)  compounds

Question 14

Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: 
(1) The isolation of the metal iron from its ores involves a series of high temperature reactions in which carbon monoxide is one of the reactants.
(2) Carbohydrates, fats, and proteins all contain the elements hydrogen, oxygen, and carbon.
(3) Substances whose molecules are both diatomic and heteroatomic must be heterogeneous mixtures.

Accepted Answer

A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true. 
A)  All three statements are true. 
B)  Two of the three statements are true. 
C)  Only one of the statements is true. 
D)  None of the statements is true.

Question 15

For the elements iodine, fluorine, and nitrogen; choose the appropriate characterization of the set's chemical symbols from the response list.

Accepted Answer

A)  All symbols have one letter. 
B)  All symbols have two letters. 
C)  All symbols start with the same letter. 
D)  All symbols start with a letter not the first letter of the element's English name. 
A)  All symbols have one letter. 
B)  All symbols have two letters. 
C)  All symbols start with the same letter. 
D)  All symbols start with a letter not the first letter of the element's English name.

Question 16

Which of the following is a property of both the liquid state and the solid state?

Accepted Answer

A)  a definite shape 
B)  an indefinite volume 
C)  an indefinite shape and a definite volume 
D)  more than one correct response 
E)  no correct response 
A)  a definite shape 
B)  an indefinite volume 
C)  an indefinite shape and a definite volume 
D)  more than one correct response 
E)  no correct response

Question 17

The most abundant elements in the universe and the Earth's crust are, respectively,

Accepted Answer

A)  oxygen and iron. 
B)  hydrogen and helium. 
C)  helium and carbon. 
D)  hydrogen and oxygen. 
A)  oxygen and iron. 
B)  hydrogen and helium. 
C)  helium and carbon. 
D)  hydrogen and oxygen.

Question 18

Which of the following substances is both heteroatomic and triatomic?

Accepted Answer

A)  HCN 
B)  H2O2 
C)  P4 
D)  H2CO3 
A)  HCN 
B)  H2O2 
C)  P4 
D)  H2CO3

Question 19

Which of the following substances is both homoatomic and tetraatomic?

Accepted Answer

A)  HCN 
B)  H2O2 
C)  P4 
D)  H2CO3 
A)  HCN 
B)  H2O2 
C)  P4 
D)  H2CO3

Question 20

Give the classification of matter when two substances are present with heteroatomic molecules.

Accepted Answer

A)  heterogeneous mixture 
B)  homogeneous mixture 
C)  compound 
D)  element 
A)  heterogeneous mixture 
B)  homogeneous mixture 
C)  compound 
D)  element

Exam 1: Basic Concepts About Matter

Which of the following is a property of both gases and liquids?

Which of the following changes is a chemical change?

The description "two substances present, two phases present" is correct for

Which of the following statements concerning pure substances is correct?

In which of the following pairs of chemical formulas do both members of the pair have the same number of atoms per molecule?

The total number of atoms present in one formula unit of Co2(SO4)3 is

In which of the following sequences of chemical formulas do all members of the sequence fit the description "heteroatomic and triatomic"?

A substance is melted. Choose the appropriate classification from the response list below:

In which of the following pairs of chemical formulas do both formulas represent compounds?

Give the classification of matter when two substances exist with two phases present

The description "two substances present, two phases present" is correct for

For the elements iodine, fluorine, and nitrogen; choose the appropriate characterization of the set's chemical symbols from the response list.

Which of the following is a property of both the liquid state and the solid state?

The most abundant elements in the universe and the Earth's crust are, respectively,

Which of the following substances is both heteroatomic and triatomic?

Which of the following substances is both homoatomic and tetraatomic?

Give the classification of matter when two substances are present with heteroatomic molecules.

Measurements in Chemistry

Atomic Structure and the Periodic Table

Chemical Bonding: the Ionic Bond Model

Chemical Bonding: the Covalent Bond Model

Chemical Calculations: Formula Masses, Moles, and Chemical Equations

Gases, Liquids, and Solids

Solutions

Chemical Reactions

Acids, Bases, and Salts

Nuclear Chemistry

Saturated Hydrocarbons

Unsaturated Hydrocarbons

Alcohols, Phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids, Esters, and Other Acid Derivatives

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes and Vitamins

Nucleic Acids

Biochemical Energy Production

Carbohydrate Metabolism

Lipid Metabolism

Protein Metabolism

Filters

The total number of atoms present in one formula unit of Co₂(SO₄)₃ is