Question 1

The _____ lists the elements that will replace elements below them in single replacement reactions.

Accepted Answer

The answer of The _____ lists the elements that will...

Question 2

When do you say an atom is oxidized or reduced?

Accepted Answer

When an oxidation number of an atom is i...

Question 3

Explain how a combustion reaction occurs. Provide an example.

Accepted Answer

A combustion reaction occurs when a reac...

Question 4

Oxidation is defined as the gain of one or more protons by an atom.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is the balanced chemical equation that represents nitrogen and hydrogen reacting to produce ammonia?

Accepted Answer

A)   N2 + 2H3  →\rightarrow→  2NH3
B)   N2 + 3H2  →\rightarrow→ 2NH3
C)   N3 + 7H2 + O2  →\rightarrow→ 3NH3 + 2H2O + H+
D)   N3 + 5H2  →\rightarrow→ 3NH3 + H+
E)   N2 + 3H2  →\rightarrow→ NH3 +H3N F) A) and B)
G) B) and E)

Question 6

Atoms in their elemental state are assigned an oxidation number of 1.

Accepted Answer

A) True 
 B)False

Question 7

The equation, H2 + O2 $\rightarrow$ H2O, is not balanced.

Accepted Answer

A) True 
 B)False

Question 8

Compare and contrast oxidation and reduction.

Accepted Answer

In reality, electrons are lost by some a...

Question 9

A _____ reaction produces a single substance from multiple reactants.

Accepted Answer

A)   synthesis
B)   decomposition
C)   neutralization
D)   combustion
E)   diffusionF) B) and E)
G) B) and D)

Question 10

_____ is a number assigned to an atom that helps keep track of the number of electrons on the atom.

Accepted Answer

The answer of _____ is a number assigned to an...

Question 11

Which of the following is an example of a synthesis reaction?

Accepted Answer

A)   2NaHCO3 → Na2CO3 + CO2 + H2O
B)   BaSO4 → Ba2+ + SO42−
C)   2H2 + O2 → 2H2O
D)   C3H8 + 5O2 → 3CO2 + 4H2O
E)   4NH3 + 3O2 → 2N2 + 6H2OF) C) and D)
G) A) and D)

Question 12

A base is a compound that increases the amount of _____ ion in an aqueous solution.

Accepted Answer

A)   oxide
B)   hydroxide
C)   hydrogen
D)   hydride
E)   hydroniumF) B) and E)
G) C) and E)

Question 13

Iron can replace aluminum by undergoing a single-replacement reaction.

Accepted Answer

A) True 
 B)False

Question 14

Reduction is defined as the gain of one or more electrons by an atom.

Accepted Answer

A) True 
 B)False

Question 15

A precipitation reaction occurs when two ionic compounds are dissolved in water and form a new ionic compound that does not dissolve.

Accepted Answer

A) True 
 B)False

Question 16

A _____ reaction occurs when two ionic compounds are dissolved in water and form a new ionic compound that does not dissolve.

Accepted Answer

A)   precipitation
B)   contamination
C)   condensation
D)   diffusion
E)   dispersionF) A) and B)
G) B) and C)

Question 17

A(n)  _____ reaction occurs when a reactant combines with oxygen, many times from the atmosphere, to produce oxides of all other elements as products.

Accepted Answer

A)   synthesis
B)   decomposition
C)   neutralization
D)   combustion
E)   diffusionF) C) and D)
G) A) and D)

Question 18

The loss of one or more electrons by an atom is called _____.

Accepted Answer

The answer of The loss of one or more electrons...

Question 19

Iodide is an example of a halogen.

Accepted Answer

A) True 
 B)False

Question 20

Consider the reaction NaCl + AgNO3. Which of the following is a spectator ion in this ionic reaction?

Accepted Answer

A)   Cl−
B)   Ag+
C)   Na+
D)   N3-
E)   O2-F) A) and B)
G) C) and D)

Exam 4: Chemical Reactions and Equations

When do you say an atom is oxidized or reduced?

Correct AnswerverifiedWhen an oxidation number of an atom is i...View AnswerShow Answer

A(n) _____ reaction occurs when a reactant combines with oxygen, many times from the atmosphere, to produce oxides of all other elements as products.

Correct AnswerverifiedShow Answer

Iodide is an example of a halogen.

Correct AnswerverifiedShow Answer

A _____ reaction produces a single substance from multiple reactants.

Correct AnswerverifiedShow Answer

A _____ reaction occurs when two ionic compounds are dissolved in water and form a new ionic compound that does not dissolve.

Correct AnswerverifiedShow Answer

Which of the following is an example of a synthesis reaction?

Correct AnswerverifiedShow Answer

Reduction is defined as the gain of one or more electrons by an atom.

Correct AnswerverifiedShow Answer

A base is a compound that increases the amount of _____ ion in an aqueous solution.

Correct AnswerverifiedShow Answer

A precipitation reaction occurs when two ionic compounds are dissolved in water and form a new ionic compound that does not dissolve.

Correct AnswerverifiedShow Answer

Oxidation is defined as the gain of one or more protons by an atom.

Correct AnswerverifiedShow Answer

The equation, H2 + O2 →\rightarrow→ H2O, is not balanced.

Correct AnswerverifiedShow Answer

_____ is a number assigned to an atom that helps keep track of the number of electrons on the atom.

Correct AnswerverifiedShow Answer

Consider the reaction NaCl + AgNO3. Which of the following is a spectator ion in this ionic reaction?

Correct AnswerverifiedShow Answer

Atoms in their elemental state are assigned an oxidation number of 1.

Correct AnswerverifiedShow Answer

The _____ lists the elements that will replace elements below them in single replacement reactions.

Correct AnswerverifiedShow Answer

Iron can replace aluminum by undergoing a single-replacement reaction.

Correct AnswerverifiedShow Answer

Which of the following is the balanced chemical equation that represents nitrogen and hydrogen reacting to produce ammonia?

Correct AnswerverifiedShow Answer

Explain how a combustion reaction occurs. Provide an example.

Correct AnswerverifiedA combustion reaction occurs when a reac...View AnswerShow Answer

Compare and contrast oxidation and reduction.

Correct AnswerverifiedIn reality, electrons are lost by some a...View AnswerShow Answer

The loss of one or more electrons by an atom is called _____.

Correct AnswerverifiedShow Answer

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When an oxidation number of an atom is i...
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The equation, H₂ + O₂ $\rightarrow$ H₂O, is not balanced.

Correct Answer
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Consider the reaction NaCl + AgNO₃. Which of the following is a spectator ion in this ionic reaction?

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A combustion reaction occurs when a reac...
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Correct Answer
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In reality, electrons are lost by some a...
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Correct Answer
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