Question 1

What coefficient is placed in front of O2 to complete the balancing of the following equation? 
    + ?   → 5   + 4 H2O

Accepted Answer

A) 1 
B) 3 
C) 5 
D) 7 
E) 9 
A) 1 
B) 3 
C) 5 
D) 7 
E) 9

Question 2

In an oxidation-reduction reaction,the substance oxidized always ________.

Accepted Answer

A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species 
A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species

Question 3

Answer the question(s)below about the following reaction.
2     → 2   O +  
-How many grams of hydrogen peroxide are needed to produce 25.0 g of oxygen?

Accepted Answer

A) 106 g 
B) 26.6 g 
C) 5.88 g 
D) 25.0 g 
E) 53.2 g 
A) 106 g 
B) 26.6 g 
C) 5.88 g 
D) 25.0 g 
E) 53.2 g

Question 4

0.400 mole of sucrose,       ,contains ________ moles of C.

Accepted Answer

A) 12 
B) 6.02 ×   
C) 5.02 ×   
D) 2.89 ×   
E) 4.80 
A) 12 
B) 6.02 ×   
C) 5.02 ×   
D) 2.89 ×   
E) 4.80

Question 5

For the following question(s),consider the following balanced equation. 
    + 6   O → 3   + 2  
-In the reaction of nitrogen gas,   ,with hydrogen gas,   ,to form ammonia gas,NH3,how many moles of hydrogen are needed to react with two moles of nitrogen? 
  + 3   → 2

Accepted Answer

A) 2 moles 
B) 4 moles 
C) 6 moles 
D) 8 moles 
E) 5.710 moles 
A) 2 moles 
B) 4 moles 
C) 6 moles 
D) 8 moles 
E) 5.710 moles

Question 6

In the following reaction Al is oxidized.
2Al + 3   → 2

Accepted Answer

A) True 
 B)False

Question 7

When the following equation is balanced,the coefficient of O2 is ________.
CH4 + O2 → CO2 +   O

Accepted Answer

Question 8

Which of the following gives the balanced equation for this reaction? 
    + Ca     →       +

Accepted Answer

A)    +   +   
B)      + Ca     →       + 3   
C) 2     + Ca     →       + 6   
D) 2     + 3Ca     →       + 6   
E)      + Ca     →       +   
A)    +   +   
B)      + Ca     →       + 3   
C) 2     + Ca     →       + 6   
D) 2     + 3Ca     →       + 6   
E)      + Ca     →       +

Question 9

When the following equation is balanced,the coefficient of O2 is ________.
C2H6 + O2 → CO2 +   O

Accepted Answer

Question 10

One mole of helium gas weighs ________.

Accepted Answer

A) 1.000 g 
B) 2.002 g 
C) 3.003 g 
D) 4.003 g 
E) 8.006 g 
A) 1.000 g 
B) 2.002 g 
C) 3.003 g 
D) 4.003 g 
E) 8.006 g

Question 11

Pentane (     )reacts with oxygen (   )to form carbon dioxide (   )and water (   O)according to the following reaction.Answer the following question(s)about this reaction.     + ?   → ?   + ?   O
-What is the coefficient for water in the balanced equation?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
E) 8 
A) 2 
B) 4 
C) 5 
D) 6 
E) 8

Question 12

Answer the question(s)below about the following reaction.
2     → 2   O +  
-How many moles of hydrogen peroxide (H2O2)are needed to produce 5.0 moles of water?

Accepted Answer

A) 1.0 mole 
B) 2.0 moles 
C) 2.5 moles 
D) 4.0 moles 
E) 5.0 moles 
A) 1.0 mole 
B) 2.0 moles 
C) 2.5 moles 
D) 4.0 moles 
E) 5.0 moles

Question 13

Answer the question(s)below about the following reaction.
2     → 2   O +  
-This is an example of a ________ reaction.

Accepted Answer

A) combustion 
B) combination 
C) decomposition 
D) single replacement 
E) double replacement 
A) combustion 
B) combination 
C) decomposition 
D) single replacement 
E) double replacement

Question 14

For the following question(s),consider the following equation.
2Mg +   → 2MgO
-How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 
2   +   → 2   O

Accepted Answer

A) 0.101 g 
B) 0.180 g 
C) 0.201 g 
D) 2.01 g 
E) 4.02 g 
A) 0.101 g 
B) 0.180 g 
C) 0.201 g 
D) 2.01 g 
E) 4.02 g

Question 15

For the following question(s),consider the following balanced equation. 
    + 6   O → 3   + 2  
-What is the correct form of the conversion factor needed to convert the number of moles of   O to the number of moles of   produced?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 16

In an oxidation-reduction reaction,the substance reduced always ________.

Accepted Answer

A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species 
A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species

Question 17

How many moles of     are in 15.0 g of     ?

Accepted Answer

A) 0.172 moles 
B) 2.61 × 103 moles 
C) 0.111 moles 
D) 0.0861 moles 
E) 0.119 moles 
A) 0.172 moles 
B) 2.61 × 103 moles 
C) 0.111 moles 
D) 0.0861 moles 
E) 0.119 moles

Question 18

In a ________ reaction,two or more elements or compounds form one product.

Accepted Answer

A) decomposition 
B) single replacement 
C) combustion 
D) double replacement 
E) combination 
A) decomposition 
B) single replacement 
C) combustion 
D) double replacement 
E) combination

Question 19

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of   to the number of moles of     produced? 
4Fe + 3   → 2

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

The following is a double replacement reaction.
2     + 5   → 4C   +   O

Accepted Answer

A) True 
 B)False

What coefficient is placed in front of O₂ to complete the balancing of the following equation? + ? → 5 + 4 H₂O

In an oxidation-reduction reaction,the substance oxidized always ________.

Answer the question(s)below about the following reaction. 2 → 2 O + -How many grams of hydrogen peroxide are needed to produce 25.0 g of oxygen?

0.400 mole of sucrose, ,contains ________ moles of C.

For the following question(s),consider the following balanced equation. + 6 O → 3 + 2 -In the reaction of nitrogen gas, ,with hydrogen gas, ,to form ammonia gas,NH₃,how many moles of hydrogen are needed to react with two moles of nitrogen? + 3 → 2

In the following reaction Al is oxidized. 2Al + 3 → 2

When the following equation is balanced,the coefficient of O₂ is ________. CH₄ + O₂ → CO₂ + O

Which of the following gives the balanced equation for this reaction? + Ca → +

When the following equation is balanced,the coefficient of O₂ is ________. C₂H₆ + O₂ → CO₂ + O

One mole of helium gas weighs ________.

Pentane ( )reacts with oxygen ( )to form carbon dioxide ( )and water ( O)according to the following reaction.Answer the following question(s)about this reaction. + ? → ? + ? O -What is the coefficient for water in the balanced equation?

Answer the question(s)below about the following reaction. 2 → 2 O + -How many moles of hydrogen peroxide (H₂O₂)are needed to produce 5.0 moles of water?

Answer the question(s)below about the following reaction. 2 → 2 O + -This is an example of a ________ reaction.

For the following question(s),consider the following equation. 2Mg + → 2MgO -How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 2 + → 2 O

For the following question(s),consider the following balanced equation. + 6 O → 3 + 2 -What is the correct form of the conversion factor needed to convert the number of moles of O to the number of moles of produced?

In an oxidation-reduction reaction,the substance reduced always ________.

How many moles of are in 15.0 g of ?

In a ________ reaction,two or more elements or compounds form one product.

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of to the number of moles of produced? 4Fe + 3 → 2

The following is a double replacement reaction. 2 + 5 → 4C + O

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Exam 7: Chemical Quantities and Reactions

What coefficient is placed in front of O2 to complete the balancing of the following equation? + ? → 5 + 4 H2O

In an oxidation-reduction reaction,the substance oxidized always ________.

Answer the question(s)below about the following reaction. 2 → 2 O + -How many grams of hydrogen peroxide are needed to produce 25.0 g of oxygen?

0.400 mole of sucrose, ,contains ________ moles of C.

For the following question(s),consider the following balanced equation. + 6 O → 3 + 2 -In the reaction of nitrogen gas, ,with hydrogen gas, ,to form ammonia gas,NH3,how many moles of hydrogen are needed to react with two moles of nitrogen? + 3 → 2

In the following reaction Al is oxidized. 2Al + 3 → 2

When the following equation is balanced,the coefficient of O2 is ________. CH4 + O2 → CO2 + O

Which of the following gives the balanced equation for this reaction? + Ca → +

When the following equation is balanced,the coefficient of O2 is ________. C2H6 + O2 → CO2 + O

One mole of helium gas weighs ________.

Pentane ( )reacts with oxygen ( )to form carbon dioxide ( )and water ( O)according to the following reaction.Answer the following question(s)about this reaction. + ? → ? + ? O -What is the coefficient for water in the balanced equation?

Answer the question(s)below about the following reaction. 2 → 2 O + -How many moles of hydrogen peroxide (H2O2)are needed to produce 5.0 moles of water?

Answer the question(s)below about the following reaction. 2 → 2 O + -This is an example of a ________ reaction.

For the following question(s),consider the following equation. 2Mg + → 2MgO -How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 2 + → 2 O

For the following question(s),consider the following balanced equation. + 6 O → 3 + 2 -What is the correct form of the conversion factor needed to convert the number of moles of O to the number of moles of produced?

In an oxidation-reduction reaction,the substance reduced always ________.

How many moles of are in 15.0 g of ?

In a ________ reaction,two or more elements or compounds form one product.

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of to the number of moles of produced? 4Fe + 3 → 2

The following is a double replacement reaction. 2 + 5 → 4C + O

Chemistry in Our Lives

Chemistry and Measurement

Matter and Energy

Atoms and Elements

Nuclear Chemistry

Ionic and Molecular Compounds

Gases

Solutions

Acids and Bases and Equilibrium

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Thiols, Ethers, Aldehydes, and Ketones

Carbohydrates

Carboxylic Acids, Esters, Amines, and Amides

Lipids

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What coefficient is placed in front of O₂ to complete the balancing of the following equation? + ? → 5 + 4 H₂O

For the following question(s),consider the following balanced equation. + 6 O → 3 + 2 -In the reaction of nitrogen gas, ,with hydrogen gas, ,to form ammonia gas,NH₃,how many moles of hydrogen are needed to react with two moles of nitrogen? + 3 → 2

When the following equation is balanced,the coefficient of O₂ is ________. CH₄ + O₂ → CO₂ + O

When the following equation is balanced,the coefficient of O₂ is ________. C₂H₆ + O₂ → CO₂ + O

Answer the question(s)below about the following reaction. 2 → 2 O + -How many moles of hydrogen peroxide (H₂O₂)are needed to produce 5.0 moles of water?