Question 1

How many oxygen atoms are there in 7.00 g of sodium dichromate,Na2Cr2O7?

Accepted Answer

A) 0.187 oxygen atoms 
B) 2.30 × 1021 oxygen atoms 
C) 1.60 × 1022 oxygen atoms 
D) 1.13 × 1023 oxygen atoms 
A) 0.187 oxygen atoms 
B) 2.30 × 1021 oxygen atoms 
C) 1.60 × 1022 oxygen atoms 
D) 1.13 × 1023 oxygen atoms

Question 2

Which one of the following is not an empirical formula?

Accepted Answer

A) CHO 
B) CH2O 
C) C2H4O 
D) C2H4O2 
A) CHO 
B) CH2O 
C) C2H4O 
D) C2H4O2

Question 3

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

Accepted Answer

Question 4

Why aren't prefixes used in naming ionic compounds?

Accepted Answer

The charges on the ions dictat

Question 5

Rb2S is named

Accepted Answer

A) rubidium disulfide. 
B) rubidium sulfide. 
C) rubidium(II)sulfide. 
D) rubidium sulfur. 
A) rubidium disulfide. 
B) rubidium sulfide. 
C) rubidium(II)sulfide. 
D) rubidium sulfur.

Question 6

How many molecules are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

Accepted Answer

A) 2.59 × 1023 molecules butane 
B) 1.46 × 1027 molecules butane 
C) 6.87 × 1023 molecules butane 
D) 1.56 × 1023 molecules butane 
E) 7.14 × 1025 molecules butane 
A) 2.59 × 1023 molecules butane 
B) 1.46 × 1027 molecules butane 
C) 6.87 × 1023 molecules butane 
D) 1.56 × 1023 molecules butane 
E) 7.14 × 1025 molecules butane

Question 7

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid.What is the coefficient for sulfuric acid when the equation is balanced using the lowest,whole-numbered coefficients?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) none of these 
A) 1 
B) 2 
C) 3 
D) none of these

Question 8

Determine the name for Cl2O.

Accepted Answer

A) chlorine oxide 
B) dichlorine monoxide 
C) chlorine (I)oxide 
D) chlorine (II)oxide 
E) chlorate 
A) chlorine oxide 
B) dichlorine monoxide 
C) chlorine (I)oxide 
D) chlorine (II)oxide 
E) chlorate

Question 9

List the elements in a hydrocarbon.

Accepted Answer

The answer of List the elements in a hydrocarbon....

Question 10

Identify the principal component of natural gas.

Accepted Answer

A) propane 
B) ethane 
C) n-butane 
D) methane 
E) n-pentane 
A) propane 
B) ethane 
C) n-butane 
D) methane 
E) n-pentane

Question 11

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

Accepted Answer

A) 5.05% 
B) 10.1% 
C) 20.2% 
D) 40.4% 
A) 5.05% 
B) 10.1% 
C) 20.2% 
D) 40.4%

Question 12

Write the formula for copper (II)sulfate pentahydrate.

Accepted Answer

A) Cu2SO3∙H5 
B) Cu2S∙H2O 
C) CuS∙5H2O 
D) (CuSO4)5 
E) CuSO4∙5H2O 
A) Cu2SO3∙H5 
B) Cu2S∙H2O 
C) CuS∙5H2O 
D) (CuSO4)5 
E) CuSO4∙5H2O

Question 13

Which one of the following compounds contains ionic bonds?

Accepted Answer

A) SrO 
B) HBr 
C) PBr3 
D) SiO2 
A) SrO 
B) HBr 
C) PBr3 
D) SiO2

Question 14

A covalent bond is best described as

Accepted Answer

A) the sharing of electrons between atoms. 
B) the transfer of electrons. 
C) a bond between a metal and a nonmetal. 
D) a bond between a metal and a polyatomic ion. 
E) a bond between two polyatomic ions. 
A) the sharing of electrons between atoms. 
B) the transfer of electrons. 
C) a bond between a metal and a nonmetal. 
D) a bond between a metal and a polyatomic ion. 
E) a bond between two polyatomic ions.

Question 15

Which of the following is the correct chemical formula for a molecule of astatine?

Accepted Answer

A) At 
B) At- 
C) At+ 
D) At2 
A) At 
B) At- 
C) At+ 
D) At2

Question 16

Match the following.
-oxygen

Accepted Answer

A) I(s) 
B) Cl(g) 
C) O(g) 
D) Cl2(g) 
E) Ne2(g)
F)Ne(g)
G)Ca(s)
H)Q2(g)
I)I2(s)
J)Ca2(s) 
A) I(s) 
B) Cl(g) 
C) O(g) 
D) Cl2(g) 
E) Ne2(g)
F)Ne(g)
G)Ca(s)
H)Q2(g)
I)I2(s)
J)Ca2(s)

Question 17

What is the mass of a single fluorine molecule,F2?

Accepted Answer

A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g 
A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g

Question 18

Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.

Accepted Answer

A) Al(C2H3O2)2(aq)+ (NH4)2PO4(aq)→ AlPO4(s)+ 2 NH4C2H3O2(aq) 
B) Al(C2H3O2)2(aq)+ (NH3)2PO4(aq)→ AlPO4(s)+ 2 NH3C2H3O2(aq) 
C) Al(CO3)2(aq)+ (NH3)2PO4(aq)→ AlPO4(s)+ 2 NH3CO3(aq) 
D) Al(C2H3O2)3(aq)+ (NH4)3PO4(aq)→ AlPO4(s)+ 3 NH4C2H3O2(aq) 
E) Al(CO2)3(aq)+ (NH4)3PO3(aq)→ AlPO3(s)+ 3 NH4CO2(aq) 
A) Al(C2H3O2)2(aq)+ (NH4)2PO4(aq)→ AlPO4(s)+ 2 NH4C2H3O2(aq) 
B) Al(C2H3O2)2(aq)+ (NH3)2PO4(aq)→ AlPO4(s)+ 2 NH3C2H3O2(aq) 
C) Al(CO3)2(aq)+ (NH3)2PO4(aq)→ AlPO4(s)+ 2 NH3CO3(aq) 
D) Al(C2H3O2)3(aq)+ (NH4)3PO4(aq)→ AlPO4(s)+ 3 NH4C2H3O2(aq) 
E) Al(CO2)3(aq)+ (NH4)3PO3(aq)→ AlPO3(s)+ 3 NH4CO2(aq)

Question 19

Which of the compounds,Li3N,NH3,C3H8,IF3 are ionic compounds?

Accepted Answer

A) only C3H8 
B) only Li3N  
C) Li3N and NH3 
D) N H3,C3H8,and IF3 
A) only C3H8 
B) only Li3N  
C) Li3N and NH3 
D) N H3,C3H8,and IF3

Question 20

Give the mass percent of carbon in C14H19NO2.

Accepted Answer

A) 38.89% 
B) 72.07% 
C) 5.17% 
D) 2.78% 
A) 38.89% 
B) 72.07% 
C) 5.17% 
D) 2.78%

How many oxygen atoms are there in 7.00 g of sodium dichromate,Na₂Cr₂O₇?

Which one of the following is not an empirical formula?

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO₃).

Why aren't prefixes used in naming ionic compounds?

Rb₂S is named

How many molecules are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid.What is the coefficient for sulfuric acid when the equation is balanced using the lowest,whole-numbered coefficients?

Determine the name for Cl₂O.

List the elements in a hydrocarbon.

Identify the principal component of natural gas.

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

Write the formula for copper (II)sulfate pentahydrate.

Which one of the following compounds contains ionic bonds?

A covalent bond is best described as

Which of the following is the correct chemical formula for a molecule of astatine?

Match the following. -oxygen

What is the mass of a single fluorine molecule,F₂?

Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.

Which of the compounds,Li₃N,NH₃,C₃H₈,IF₃ are ionic compounds?

Give the mass percent of carbon in C₁₄H₁₉NO₂.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

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Exam 3: Molecules, Compounds and Chemical Equations

How many oxygen atoms are there in 7.00 g of sodium dichromate,Na2Cr2O7?

Which one of the following is not an empirical formula?

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

Why aren't prefixes used in naming ionic compounds?

Rb2S is named

How many molecules are contained in 25.0 mL of butane? The density of butane is 0.6011 g/mL and the molar mass is 58.12 g/mol.

Calcium phosphate reacts with sulfuric acid to form calcium sulfate and phosphoric acid.What is the coefficient for sulfuric acid when the equation is balanced using the lowest,whole-numbered coefficients?

Determine the name for Cl2O.

List the elements in a hydrocarbon.

Identify the principal component of natural gas.

A sample of pure lithium nitrate contains 10.1% lithium by mass.What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

Write the formula for copper (II)sulfate pentahydrate.

Which one of the following compounds contains ionic bonds?

A covalent bond is best described as

Which of the following is the correct chemical formula for a molecule of astatine?

Match the following. -oxygen

What is the mass of a single fluorine molecule,F2?

Write a balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.

Which of the compounds,Li3N,NH3,C3H8,IF3 are ionic compounds?

Give the mass percent of carbon in C14H19NO2.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

How many oxygen atoms are there in 7.00 g of sodium dichromate,Na₂Cr₂O₇?

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO₃).

Rb₂S is named

Determine the name for Cl₂O.

What is the mass of a single fluorine molecule,F₂?

Which of the compounds,Li₃N,NH₃,C₃H₈,IF₃ are ionic compounds?

Give the mass percent of carbon in C₁₄H₁₉NO₂.