Question 1

A _____ is the symbolic representation of a chemical reaction in terms of chemical formulas.

Accepted Answer

A) ​chemical bond 
B) ​chemical reagent 
C) ​chemical energy 
D) ​chemical reactant 
E) ​chemical equation 
A) ​chemical bond 
B) ​chemical reagent 
C) ​chemical energy 
D) ​chemical reactant 
E) ​chemical equation

Question 2

Which of the following molecules contains the ether functional group?

Accepted Answer

A) CH3CH2NH2 
B) CH3CH2OCH2CH3 
C) CH3CH2OH 
D) CH3CH2COOH 
E) H2O 
A) CH3CH2NH2 
B) CH3CH2OCH2CH3 
C) CH3CH2OH 
D) CH3CH2COOH 
E) H2O

Question 3

The formula for aluminum bromide is

Accepted Answer

A) AlB. 
B) AlBr. 
C) Al2Br3. 
D) AlBr2. 
E) AlBr3. 
A) AlB. 
B) AlBr. 
C) Al2Br3. 
D) AlBr2. 
E) AlBr3.

Question 4

How many electrons does a barium ion have?

Accepted Answer

A) 56 
B) 8 
C) 54 
D) 44 
E) 2 
A) 56 
B) 8 
C) 54 
D) 44 
E) 2

Question 5

The complete combustion of pentane yields carbon dioxide and water.When the equation
__ C5H12(l)+ __ O2(g)→ __ CO2(g)+ __ H2O(l)
Is balanced,the ratio of the coefficient of CO2 to the coefficient of O2 is

Accepted Answer

A) 8:5. 
B) 8:6. 
C) 6:5. 
D) 5:6. 
E) 5:8. 
A) 8:5. 
B) 8:6. 
C) 6:5. 
D) 5:6. 
E) 5:8.

Question 6

What is the symbol for the element phosphorus?

Accepted Answer

A) Po 
B) P 
C) Pt 
D) K 
E) Pr 
A) Po 
B) P 
C) Pt 
D) K 
E) Pr

Question 7

Which name-formula pair is incorrect?

Accepted Answer

A) hypochlorous acid,HClO2 
B) titanium(IV)carbide,TiC 
C) strontium nitride,Sr3N2 
D) magnesium sulfate heptahydrate,MgSO4·7H2O 
E) dinitrogen tetroxide,N2O4 
A) hypochlorous acid,HClO2 
B) titanium(IV)carbide,TiC 
C) strontium nitride,Sr3N2 
D) magnesium sulfate heptahydrate,MgSO4·7H2O 
E) dinitrogen tetroxide,N2O4

Question 8

According to the law of multiple proportions:

Accepted Answer

A) the total mass is the same after a chemical change as before the change. 
B) it is not possible for the same two elements to form more than one compound. 
C) the ratio of the masses of the elements in a compound is always the same. 
D) if the same two elements form two different compounds,they do so in the same ratio. 
E) none of these 
A) the total mass is the same after a chemical change as before the change. 
B) it is not possible for the same two elements to form more than one compound. 
C) the ratio of the masses of the elements in a compound is always the same. 
D) if the same two elements form two different compounds,they do so in the same ratio. 
E) none of these

Question 9

How many electrons does the ion   have?

Accepted Answer

A) 18 
B) 36 
C) 16 
D) 34 
E) 19 
A) 18 
B) 36 
C) 16 
D) 34 
E) 19

Question 10

How many neutrons are there in the cobalt-59 nuclide?

Accepted Answer

A) 27 
B) 2 
C) ​86 
D) ​59 
E) ​32 
A) 27 
B) 2 
C) ​86 
D) ​59 
E) ​32

Question 11

For the following balanced chemical equation,which substance represents the catalyst?
2CO(g)+ 2NO(g)  
2CO2(g)+ N2(g)

Accepted Answer

A) NO(g) 
B) CO(g) 
C) CO2(g) 
D) N2(g) 
E) Rh(s) 
A) NO(g) 
B) CO(g) 
C) CO2(g) 
D) N2(g) 
E) Rh(s)

Question 12

Who discovered the nucleus of an atom?

Accepted Answer

A) Thomson 
B) de Broglie 
C) Rutherford 
D) Bohr 
E) Heisenberg 
A) Thomson 
B) de Broglie 
C) Rutherford 
D) Bohr 
E) Heisenberg

Question 13

The correct name for LiCl is

Accepted Answer

A) monolithium chloride. 
B) lithium chloride. 
C) lithium(I)chloride. 
D) monolithium monochloride. 
E) lithium monochloride. 
A) monolithium chloride. 
B) lithium chloride. 
C) lithium(I)chloride. 
D) monolithium monochloride. 
E) lithium monochloride.

Question 14

The formula for hypochlorous acid is

Accepted Answer

A) HClO4. 
B) HClO3. 
C) HCl. 
D) HClO2. 
E) HClO. 
A) HClO4. 
B) HClO3. 
C) HCl. 
D) HClO2. 
E) HClO.

Question 15

The formula for copper(II)phosphate is

Accepted Answer

A) Co2(PO4)3. 
B) CuPO4. 
C) Co3(PO4)2. 
D) Cu2(PO4)3. 
E) Cu3(PO4)2. 
A) Co2(PO4)3. 
B) CuPO4. 
C) Co3(PO4)2. 
D) Cu2(PO4)3. 
E) Cu3(PO4)2.

Question 16

An important class of molecular substances that contain carbon combined with other elements,such as hydrogen,oxygen,and nitrogen,is _____.

Accepted Answer

A) ​organic compounds 
B) ​radioactive isotones 
C) ​radioactive isotopes 
D) inorganic compounds​ 
E) ​stable isotopes 
A) ​organic compounds 
B) ​radioactive isotones 
C) ​radioactive isotopes 
D) inorganic compounds​ 
E) ​stable isotopes

Question 17

When the equation
__ C5H6N2OS(s)+ __ O2(g)→ __ CO2(g)+ __ H2O(l)+ __ N2(g)+ __ SO2(g)
Is balanced,the sum of all the coefficients (simplest whole number)is

Accepted Answer

A) 19. 
B) 20. 
C) 24. 
D) 18. 
E) 21. 
A) 19. 
B) 20. 
C) 24. 
D) 18. 
E) 21.

Question 18

All of the following elements are best classified as metalloids except

Accepted Answer

A) Si. 
B) Te. 
C) As. 
D) B. 
E) Ga. 
A) Si. 
B) Te. 
C) As. 
D) B. 
E) Ga.

Question 19

All the following ions have the same charge except

Accepted Answer

A) oxide. 
B) monohydrogen phosphate. 
C) peroxide. 
D) permanganate. 
E) oxalate. 
A) oxide. 
B) monohydrogen phosphate. 
C) peroxide. 
D) permanganate. 
E) oxalate.

Question 20

The oxoanion that comes from nitric acid is

Accepted Answer

A) N2O3-. 
B) NO3-. 
C) HNO3-. 
D) NO-. 
E) NO2-. 
A) N2O3-. 
B) NO3-. 
C) HNO3-. 
D) NO-. 
E) NO2-.

Exam 2: Atoms, molecules, and Ions

A _____ is the symbolic representation of a chemical reaction in terms of chemical formulas.

Which of the following molecules contains the ether functional group?

The formula for aluminum bromide is

How many electrons does a barium ion have?

The complete combustion of pentane yields carbon dioxide and water.When the equation __ C5H12(l)+ __ O2(g)→ __ CO2(g)+ __ H2O(l) Is balanced,the ratio of the coefficient of CO2 to the coefficient of O2 is

What is the symbol for the element phosphorus?

Which name-formula pair is incorrect?

According to the law of multiple proportions:

How many electrons does the ion have?

How many neutrons are there in the cobalt-59 nuclide?

For the following balanced chemical equation,which substance represents the catalyst? 2CO(g)+ 2NO(g) 2CO2(g)+ N2(g)

Who discovered the nucleus of an atom?

The correct name for LiCl is

The formula for hypochlorous acid is

The formula for copper(II)phosphate is

An important class of molecular substances that contain carbon combined with other elements,such as hydrogen,oxygen,and nitrogen,is _____.

When the equation __ C5H6N2OS(s)+ __ O2(g)→ __ CO2(g)+ __ H2O(l)+ __ N2(g)+ __ SO2(g) Is balanced,the sum of all the coefficients (simplest whole number)is

All of the following elements are best classified as metalloids except

All the following ions have the same charge except

The oxoanion that comes from nitric acid is

Chemistry and Measurement

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

The complete combustion of pentane yields carbon dioxide and water.When the equation C₅H₁₂(l)+ O₂(g)→ CO₂(g)+ H₂O(l) Is balanced,the ratio of the coefficient of CO₂ to the coefficient of O₂ is

For the following balanced chemical equation,which substance represents the catalyst? 2CO(g)+ 2NO(g) 2CO₂(g)+ N₂(g)

When the equation C₅H₆N₂OS(s)+ O₂(g)→ CO₂(g)+ H₂O(l)+ N₂(g)+ SO₂(g) Is balanced,the sum of all the coefficients (simplest whole number)is