Question 1

When a salt is dissolved in water, it is represented by the following notation in a chemical reaction?

Accepted Answer

A)  aq) 
B)  l) 
C)  s) 
A)  aq) 
B)  l) 
C)  s)

Question 2

Which is the correct balanced reaction for the combustion of methane?  Paired item 1)

Accepted Answer

A)  CH4g) + O2g) $\rightarrow$  CO2g) + H2Og) 
B)  CH4g) + 4Og) $\rightarrow$ CO2g) + 2H2Og) 
C)  CH4g) + 2O2g) $\rightarrow$  CO2g) + 2H2Og) 
A)  CH4g) + O2g) $\rightarrow$  CO2g) + H2Og) 
B)  CH4g) + 4Og) $\rightarrow$ CO2g) + 2H2Og) 
C)  CH4g) + 2O2g) $\rightarrow$  CO2g) + 2H2Og)

Question 3

How many mole ratios can be correctly obtained from the balanced chemical equation 2Al2O3l) $\rightarrow$ 4Als) + 3O2g)?

Accepted Answer

A)  3 
B)  4 
C)  6 
A)  3 
B)  4 
C)  6

Question 4

What precipitate forms when mixing copperII) sulfate and sodium sulfate?

Accepted Answer

A)  copperI) sulfate 
B)  copperIII) sulfate 
C)  no precipitate forms 
A)  copperI) sulfate 
B)  copperIII) sulfate 
C)  no precipitate forms

Question 5

Which of the following is an acid-base reaction?

Accepted Answer

A)  Mgs) + 2HClaq) $\rightarrow$  MgCl2aq) + H2g) 
B)  HClO4aq) + NaOHaq) $\rightarrow$ NaClO4aq) + H2Ol) 
C)  PbNO3)2aq) + 2KIaq) $\rightarrow$  PbI2s) + 2KNO3aq) 
A)  Mgs) + 2HClaq) $\rightarrow$  MgCl2aq) + H2g) 
B)  HClO4aq) + NaOHaq) $\rightarrow$ NaClO4aq) + H2Ol) 
C)  PbNO3)2aq) + 2KIaq) $\rightarrow$  PbI2s) + 2KNO3aq)

Question 6

The combustion of 0.136 kg of methane in the presence of excess oxygen produces 353 g of carbon dioxide. What is the percent yield?

Accepted Answer

A)  38.5 % 
B)  94.6 % 
C)  0.946 % 
A)  38.5 % 
B)  94.6 % 
C)  0.946 %

Question 7

What is the oxidation number of hydrogen in H2O2?

Accepted Answer

A)  +2 
B)  +1 
C)  0 
A)  +2 
B)  +1 
C)  0

Question 8

What is the oxidation number of Cr in a dichromate anion?

Accepted Answer

A)  +6 
B)  +3 
C)  +2 
A)  +6 
B)  +3 
C)  +2

Question 9

The combustion of butane produced 0.0243 kg of carbon dioxide. What mass of butane is required if the yield is 89 %.  Paired item 1)

Accepted Answer

A)  36.1 g 
B)  9.01 g 
C)  144.2 g 
A)  36.1 g 
B)  9.01 g 
C)  144.2 g

Question 10

Which of the following is a strong acid?

Accepted Answer

A)  HNO3 
B)  CaSO4 
C)  NH3 
A)  HNO3 
B)  CaSO4 
C)  NH3

Question 11

The combustion of propane produced 8.53 g of carbon dioxide. What mass of propane is required if the yield is 93 %.

Accepted Answer

A)  3.06 g 
B)  9.19 g 
C)  27.6 g 
A)  3.06 g 
B)  9.19 g 
C)  27.6 g

Question 12

The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the theoretical yield?

Accepted Answer

A)  371.2 g 
B)  0.8377 g 
C)  0.3712 g 
A)  371.2 g 
B)  0.8377 g 
C)  0.3712 g

Question 13

The symbol that separates the reactants from products in a reaction and means "to yield" is ________.

Accepted Answer

A)  + 
B)  s) 
C)  ($\rightarrow$ ) 
A)  + 
B)  s) 
C)  ($\rightarrow$ )

Question 14

What instrument is used during an acid-base titration experiment to deliver the titrant?

Accepted Answer

A)  buret 
B)  syringe 
C)  pipette 
A)  buret 
B)  syringe 
C)  pipette

Question 15

Which is the correct balanced reaction for the combustion of octane?

Accepted Answer

A)  2C8H18g) + 25O2g) $\rightarrow$ 16CO2g) + 18H2Og) 
B)  C8H18g) + 12.5O2g) $\rightarrow$ 8CO2g) + 9H2Og) 
C)  C8H18g) + 25Og) $\rightarrow$  8CO2g) + 9H2Og) 
A)  2C8H18g) + 25O2g) $\rightarrow$ 16CO2g) + 18H2Og) 
B)  C8H18g) + 12.5O2g) $\rightarrow$ 8CO2g) + 9H2Og) 
C)  C8H18g) + 25Og) $\rightarrow$  8CO2g) + 9H2Og)

Question 16

The reaction CH4g) + 2O2g) $\rightarrow$ CO2g) + 2H2Og) is an example of _____?  Paired item 1)

Accepted Answer

A)  an acid-base reaction 
B)  a combustion reaction 
C)  a precipitation reaction 
A)  an acid-base reaction 
B)  a combustion reaction 
C)  a precipitation reaction

Question 17

What is the density of a 0.354 M solution of ammonium phosphate?

Accepted Answer

A)  0.0523 g/mL 
B)  5.23 g/mL 
C)  52.3 g/mL 
A)  0.0523 g/mL 
B)  5.23 g/mL 
C)  52.3 g/mL

Question 18

What is the oxidation number of diatomic elements?

Accepted Answer

A)  0 
B)  +1 
C)  +2 
A)  0 
B)  +1 
C)  +2

Question 19

The chemical reaction CaCO3 $\rightarrow$ CaO + CO2 is classified as a

Accepted Answer

A)  synthesis reaction 
B)  decomposition reaction 
C)  single-replacement reaction 
A)  synthesis reaction 
B)  decomposition reaction 
C)  single-replacement reaction

Question 20

What salt is formed between LiOH and HBr?

Accepted Answer

A)  LiBr 
B)  LiBr2 
C)  Li2Br 
A)  LiBr 
B)  LiBr2 
C)  Li2Br

When a salt is dissolved in water, it is represented by the following notation in a chemical reaction?

Which is the correct balanced reaction for the combustion of methane? Paired item 1)

How many mole ratios can be correctly obtained from the balanced chemical equation 2Al₂O₃l) $\rightarrow$ 4Als) + 3O₂g)?

What precipitate forms when mixing copperII) sulfate and sodium sulfate?

Which of the following is an acid-base reaction?

The combustion of 0.136 kg of methane in the presence of excess oxygen produces 353 g of carbon dioxide. What is the percent yield?

What is the oxidation number of hydrogen in H₂O₂?

What is the oxidation number of Cr in a dichromate anion?

The combustion of butane produced 0.0243 kg of carbon dioxide. What mass of butane is required if the yield is 89 %. Paired item 1)

Which of the following is a strong acid?

The combustion of propane produced 8.53 g of carbon dioxide. What mass of propane is required if the yield is 93 %.

The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the theoretical yield?

The symbol that separates the reactants from products in a reaction and means "to yield" is ________.

What instrument is used during an acid-base titration experiment to deliver the titrant?

Which is the correct balanced reaction for the combustion of octane?

The reaction CH₄g) + 2O₂g) $\rightarrow$ CO₂g) + 2H₂Og) is an example of _____? Paired item 1)

What is the density of a 0.354 M solution of ammonium phosphate?

What is the oxidation number of diatomic elements?

The chemical reaction CaCO₃ $\rightarrow$ CaO + CO₂ is classified as a

What salt is formed between LiOH and HBr?

Essential Ideas

Atoms, Molecules, and Ions

Composition of Substances and Solutions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

Exam 4: Stoichiometry of Chemical Reactions

When a salt is dissolved in water, it is represented by the following notation in a chemical reaction?

Which is the correct balanced reaction for the combustion of methane? Paired item 1)

How many mole ratios can be correctly obtained from the balanced chemical equation 2Al2O3l) →\rightarrow→ 4Als) + 3O2g)?

What precipitate forms when mixing copperII) sulfate and sodium sulfate?

Which of the following is an acid-base reaction?

The combustion of 0.136 kg of methane in the presence of excess oxygen produces 353 g of carbon dioxide. What is the percent yield?

What is the oxidation number of hydrogen in H2O2?

What is the oxidation number of Cr in a dichromate anion?

The combustion of butane produced 0.0243 kg of carbon dioxide. What mass of butane is required if the yield is 89 %. Paired item 1)

Which of the following is a strong acid?

The combustion of propane produced 8.53 g of carbon dioxide. What mass of propane is required if the yield is 93 %.

The combustion of 0.1240 kg of propane in the presence of excess oxygen produces 0.3110 kg of carbon dioxide. What is the theoretical yield?

The symbol that separates the reactants from products in a reaction and means "to yield" is ________.

What instrument is used during an acid-base titration experiment to deliver the titrant?

Which is the correct balanced reaction for the combustion of octane?

The reaction CH4g) + 2O2g) →\rightarrow→ CO2g) + 2H2Og) is an example of _____? Paired item 1)

What is the density of a 0.354 M solution of ammonium phosphate?

What is the oxidation number of diatomic elements?

The chemical reaction CaCO3 →\rightarrow→ CaO + CO2 is classified as a

What salt is formed between LiOH and HBr?

Essential Ideas

Atoms, Molecules, and Ions

Composition of Substances and Solutions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

How many mole ratios can be correctly obtained from the balanced chemical equation 2Al₂O₃l) $\rightarrow$ 4Als) + 3O₂g)?

What is the oxidation number of hydrogen in H₂O₂?

The reaction CH₄g) + 2O₂g) $\rightarrow$ CO₂g) + 2H₂Og) is an example of _____? Paired item 1)

The chemical reaction CaCO₃ $\rightarrow$ CaO + CO₂ is classified as a