Question 1

Which combination is used to represent molecular hydrogen and atomic hydrogen, respectively?

Accepted Answer

A) H2, H 
B) He, H- 
C) H, H 
D) 2H, H+ 
E) Hy, H 
A) H2, H 
B) He, H- 
C) H, H 
D) 2H, H+ 
E) Hy, H

Question 2

The phosphide ion has 18 electrons and 18 protons.

Accepted Answer

A) True 
 B)False

Question 3

The number of atoms in one formula unit of the substance Cs2SO4·5H2O is

Accepted Answer

A) 4 
B) 17 
C) 22 
D) 25 
E) 33 
A) 4 
B) 17 
C) 22 
D) 25 
E) 33

Question 4

Oxygen reacts with a metal, which we will represent by the symbol Wp, to form a compound whose formula is Wp2O. Element Wp is most probably

Accepted Answer

A) a metalloid. 
B) a group 2A element. 
C) a chalcogen. 
D) a group 1A element. 
E) there are no elements that can react with oxygen to give the formula Wp2O. 
A) a metalloid. 
B) a group 2A element. 
C) a chalcogen. 
D) a group 1A element. 
E) there are no elements that can react with oxygen to give the formula Wp2O.

Question 5

Which of the following is not a property of metals?

Accepted Answer

A) They have a shine called a metallic luster. 
B) They are good conductors of electricity. 
C) They are generally poor conductors of heat. 
D) They can be rolled into thin sheets. 
E) Some metals are quite hard, while some are soft. 
A) They have a shine called a metallic luster. 
B) They are good conductors of electricity. 
C) They are generally poor conductors of heat. 
D) They can be rolled into thin sheets. 
E) Some metals are quite hard, while some are soft.

Question 6

Which compound is correctly represented as a hydrate?

Accepted Answer

A) CuSO4·5H2O 
B) HC2H3O2 
C) O2S(OH)2 
D) H2S2O7 
E) C6(H2O)6 
A) CuSO4·5H2O 
B) HC2H3O2 
C) O2S(OH)2 
D) H2S2O7 
E) C6(H2O)6

Question 7

How many protons and electrons are in the Ca2+ ion?

Accepted Answer

20 protons

Question 8

How many atoms are in one molecule of Mo2(O2CC(CH3)3)4? Hint: Remember to distribute the subscripts to all elements inside the parenthesis. Start on the inside and work your way out.

Accepted Answer

A) 17 
B) 30 
C) 60 
D) 66 
E) 64 
A) 17 
B) 30 
C) 60 
D) 66 
E) 64

Question 9

What is the name for the compound CuBr2?

Accepted Answer

A) copper(I)bromide(II) 
B) copper(II)bromide 
C) copper(II)bromite 
D) copper dibromide 
E) cuprous bromide 
A) copper(I)bromide(II) 
B) copper(II)bromide 
C) copper(II)bromite 
D) copper dibromide 
E) cuprous bromide

Question 10

A name for the compound P4Se10 is phosphorus(IV)selenium.

Accepted Answer

A) True 
 B)False

Question 11

Classify the following three elements as a metal, metalloid, or nonmetal: P, Si, Al.

Accepted Answer

A) P, metal; Si, metalloid; Al, nonmetal 
B) P, metal; Al, metalloid; Si, nonmetal 
C) Al, metal; P, metalloid; Si, nonmetal 
D) Si, metal; Al, metalloid; P, nonmetal 
E) Al, metal; Si, metalloid; P, nonmetal 
A) P, metal; Si, metalloid; Al, nonmetal 
B) P, metal; Al, metalloid; Si, nonmetal 
C) Al, metal; P, metalloid; Si, nonmetal 
D) Si, metal; Al, metalloid; P, nonmetal 
E) Al, metal; Si, metalloid; P, nonmetal

Question 12

What is the name of the compound, S2Cl2?

Accepted Answer

A) disulfur chlorate 
B) disulfur dichloride 
C) disulfur dichlorine 
D) sulfur(I)chloride 
E) sulfur(II)chlorine(II) 
A) disulfur chlorate 
B) disulfur dichloride 
C) disulfur dichlorine 
D) sulfur(I)chloride 
E) sulfur(II)chlorine(II)

Question 13

The common name for the compound, C2H6, is

Accepted Answer

A) carbon hydride. 
B) carbon hexahydride. 
C) ethane. 
D) methane. 
E) propane. 
A) carbon hydride. 
B) carbon hexahydride. 
C) ethane. 
D) methane. 
E) propane.

Question 14

Write the formula of the single product in the reaction below if its coefficient is 5. 3P4O10 + 2P4S10$\rarr$ 5 ??? Hint: Determine the necessary ratio of elements on the reactant side.

Accepted Answer

A) P6O6S5 
B) P4O6S4 
C) P4O16S6 
D) P8O3S8 
E) P12O3S10 
A) P6O6S5 
B) P4O6S4 
C) P4O16S6 
D) P8O3S8 
E) P12O3S10

Question 15

Which compound below is correctly indicated as magnesium sulfate heptahydrate?

Accepted Answer

A) CaSO4·2H2O 
B) MgSO4·7H2O 
C) CuSO4·5H2O 
D) CoCl2·6H2O 
E) 7MnSO4·2H2O 
A) CaSO4·2H2O 
B) MgSO4·7H2O 
C) CuSO4·5H2O 
D) CoCl2·6H2O 
E) 7MnSO4·2H2O

Question 16

What is the formula for the oxalate ion?

Accepted Answer

A) CO32 
B) C4O22 
C) C4O42 
D) C2O42 
E) C2H3O2 
A) CO32 
B) C4O22 
C) C4O42 
D) C2O42 
E) C2H3O2

Question 17

What molecule is missing that would balance the given equation?
 4Au + 8NaCN + ?? + 2H2O ? 4NaAu(CN)2 + 4NaOH.If a coefficient other than one is needed provide the coefficient. Hint: Figure out which elements are missing and consider the ratio of those elements.

Accepted Answer

Question 18

Which formula is correct because it represents a known ionic compound?

Accepted Answer

A) Be2Br4 
B) Ca2I2 
C) K2S 
D) Rb2Br 
E) Ca2S3 
A) Be2Br4 
B) Ca2I2 
C) K2S 
D) Rb2Br 
E) Ca2S3

Question 19

Which is the correct name for the compound FeBr3?

Accepted Answer

A) ferrous bromide 
B) iron(III)bromide 
C) iron bromite 
D) iron tribromide 
E) iron tribromine 
A) ferrous bromide 
B) iron(III)bromide 
C) iron bromite 
D) iron tribromide 
E) iron tribromine

Question 20

Phosphorus can combine with hydrogen to form the compound, PH3.

Accepted Answer

A) True 
 B)False

Exam 3: Elements, Compounds, and the Periodic Table

Which combination is used to represent molecular hydrogen and atomic hydrogen, respectively?

The phosphide ion has 18 electrons and 18 protons.

The number of atoms in one formula unit of the substance Cs2SO4·5H2O is

Oxygen reacts with a metal, which we will represent by the symbol Wp, to form a compound whose formula is Wp2O. Element Wp is most probably

Which of the following is not a property of metals?

Which compound is correctly represented as a hydrate?

How many protons and electrons are in the Ca2+ ion?

How many atoms are in one molecule of Mo2(O2CC(CH3)3)4? Hint: Remember to distribute the subscripts to all elements inside the parenthesis. Start on the inside and work your way out.

What is the name for the compound CuBr2?

A name for the compound P4Se10 is phosphorus(IV)selenium.

Classify the following three elements as a metal, metalloid, or nonmetal: P, Si, Al.

What is the name of the compound, S2Cl2?

The common name for the compound, C2H6, is

Write the formula of the single product in the reaction below if its coefficient is 5. 3P4O10 + 2P4S10 →\rarr→ 5 ??? Hint: Determine the necessary ratio of elements on the reactant side.

Which compound below is correctly indicated as magnesium sulfate heptahydrate?

What is the formula for the oxalate ion?

What molecule is missing that would balance the given equation? 4Au + 8NaCN + ?? + 2H2O ? 4NaAu(CN)2 + 4NaOH.If a coefficient other than one is needed provide the coefficient. Hint: Figure out which elements are missing and consider the ratio of those elements.

Which formula is correct because it represents a known ionic compound?

Which is the correct name for the compound FeBr3?

Phosphorus can combine with hydrogen to form the compound, PH3.

A Very Brief History of Chemistry

Scientific Measurements

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

The number of atoms in one formula unit of the substance Cs₂SO₄·5H₂O is

Oxygen reacts with a metal, which we will represent by the symbol Wp, to form a compound whose formula is Wp₂O. Element Wp is most probably

How many protons and electrons are in the Ca²⁺ ion?

How many atoms are in one molecule of Mo₂(O₂CC(CH₃)₃)₄? Hint: Remember to distribute the subscripts to all elements inside the parenthesis. Start on the inside and work your way out.

What is the name for the compound CuBr₂?

A name for the compound P₄Se₁₀ is phosphorus(IV)selenium.

What is the name of the compound, S₂Cl₂?

The common name for the compound, C₂H₆, is

Write the formula of the single product in the reaction below if its coefficient is 5. 3P₄O₁₀ + 2P₄S₁₀ $\rarr$ 5 ??? Hint: Determine the necessary ratio of elements on the reactant side.

What molecule is missing that would balance the given equation? 4Au + 8NaCN + ?? + 2H₂O ? 4NaAu(CN)₂ + 4NaOH.If a coefficient other than one is needed provide the coefficient. Hint: Figure out which elements are missing and consider the ratio of those elements.

Which is the correct name for the compound FeBr₃?

Phosphorus can combine with hydrogen to form the compound, PH₃.