Question 1

The ________ is the minimum energy needed for a chemical reaction to begin.

Accepted Answer

A) reaction energy 
B) activation energy 
C) energy of reactants 
D) energy of products 
E) heat of reaction 
A) reaction energy 
B) activation energy 
C) energy of reactants 
D) energy of products 
E) heat of reaction

Question 2

0.100 mole of lithium has a mass of ________.

Accepted Answer

A) 3.00 g 
B) 0.300 g 
C) 6.94 g 
D) 0.694 g 
E) 0.700 g 
A) 3.00 g 
B) 0.300 g 
C) 6.94 g 
D) 0.694 g 
E) 0.700 g

Question 3

For the following question(s),consider the following balanced equation. MgS1U1B13S1U1B0NS1U1B12S1U1B0 + 6HS1U1B12S1U1B0O → 3Mg(OH)S1U1B12S1U1B0 + 2NHS1U1B13S1U1B0 
-What is the correct form of the conversion factor needed to convert the number of moles of H2O to the number of moles of  NH3 produced?

Accepted Answer

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

Question 4

What is the coefficient of hydrogen, H2 ,when the following equation is balanced? Al + H2SO4 → Al2(SO4)3+ ?H2

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 5

What is oxidized and what is reduced in the following reaction? 2Al + 3Br2 → 2AlBr3

Accepted Answer

A) Al is oxidized and Br2 is reduced. 
B) AlBr3 is reduced and Br2 is oxidized. 
C) Al is reduced and Br2 is oxidized. 
D)  AlBr3 is reduced and Al is oxidized. 
E)  AlBr3 is oxidized and Al is reduced. 
A) Al is oxidized and Br2 is reduced. 
B) AlBr3 is reduced and Br2 is oxidized. 
C) Al is reduced and Br2 is oxidized. 
D)  AlBr3 is reduced and Al is oxidized. 
E)  AlBr3 is oxidized and Al is reduced.

Question 6

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 7

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of O2 to the number of moles of Fe2O3  produced? 4Fe + 3O2 → 2Fe2O3

Accepted Answer

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

Question 8

For the following question(s),consider the following equation.
2Mg + OS1U1B12S1U1B0 → 2MgO
-How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?

Accepted Answer

A) 40.3 g 
B) 50.4 g 
C) 60.5 g 
D) 101 g 
E) 202 g 
A) 40.3 g 
B) 50.4 g 
C) 60.5 g 
D) 101 g 
E) 202 g

Question 9

When 25.0 g of KClO3 reacts,how many grams of O2 are produced?
2KClO3 → 2KCl + 3O2

Accepted Answer

Question 10

What type of reaction is:   + 2   →   + 2   O + 218 kcal?

Accepted Answer

A) an endothermic reaction 
B) an exothermic reaction 
C) a single replacement reaction 
D) a combination reaction 
E) a decomposition reaction 
A) an endothermic reaction 
B) an exothermic reaction 
C) a single replacement reaction 
D) a combination reaction 
E) a decomposition reaction

Question 11

Answer the question(s)below about the following reaction.
2     → 2   O +  
-How many moles of oxygen gas can 5.0 moles of hydrogen peroxide ( H2O2)produce,if decomposition is complete?

Accepted Answer

A) 5.0 moles 
B) 2.5 moles 
C) 1.0 mole 
D) 2.0 moles 
E) 10.moles 
A) 5.0 moles 
B) 2.5 moles 
C) 1.0 mole 
D) 2.0 moles 
E) 10.moles

Question 12

For the following question(s),consider the following balanced equation. MgS1U1B13S1U1B0NS1U1B12S1U1B0 + 6HS1U1B12S1U1B0O → 3Mg(OH)S1U1B12S1U1B0 + 2NHS1U1B13S1U1B0 
-When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl2 ,how many moles of aluminum chloride are produced? 2Al + 3Cl2 → 2AlCl3

Accepted Answer

A) 1 mole 
B) 2 moles 
C) 3 moles 
D) 4 moles 
E) 5 moles 
A) 1 mole 
B) 2 moles 
C) 3 moles 
D) 4 moles 
E) 5 moles

Question 13

Pentane (  CS1U1B15S1U1B0HS1U1B112S1U1B0 )reacts with oxygen ( OS1U1B12S1U1B0 )to form carbon dioxide ( COS1U1B12S1U1B0 )and water ( HS1U1B12S1U1B0O)according to the following reaction.Answer the following question(s)about this reaction. CS1U1B15S1U1B0HS1U1B112S1U1B0 + ?OS1U1B12S1U1B0  → ?COS1U1B12S1U1B0 + ?HS1U1B12S1U1B0O
-In this reaction,what is the correct coefficient for sodium chloride? Pb(NO3)2 + ? NaCl → PbCl2 + ? NaNO3

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 14

In this reaction,what is the substance oxidized? Zn + 2 HCl → ZnCl2 + H2

Accepted Answer

A) chlorine 
B) zinc chloride 
C) hydrogen 
D) zinc 
E) oxygen 
A) chlorine 
B) zinc chloride 
C) hydrogen 
D) zinc 
E) oxygen

The ________ is the minimum energy needed for a chemical reaction to begin.

0.100 mole of lithium has a mass of ________.

For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -What is the correct form of the conversion factor needed to convert the number of moles of H₂O to the number of moles of NH₃ produced?

What is the coefficient of hydrogen, H₂ ,when the following equation is balanced? Al + H₂SO₄ → Al₂(SO₄)₃+ ?H₂

What is oxidized and what is reduced in the following reaction? 2Al + 3Br₂ → 2AlBr₃

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 O₂ to the number of moles of Fe₂O₃ produced? 4Fe + 3O₂ → 2Fe₂O₃

For the following question(s),consider the following equation. 2Mg + O₂ → 2MgO -How many grams of MgO are produced when 40.0 grams of O₂ react completely with Mg?

When 25.0 g of KClO₃ reacts,how many grams of O₂ are produced? 2KClO₃ → 2KCl + 3O₂

What type of reaction is: + 2 → + 2 O + 218 kcal?

Answer the question(s)below about the following reaction. 2 → 2 O + -How many moles of oxygen gas can 5.0 moles of hydrogen peroxide ( H2O2)produce,if decomposition is complete?

For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl₂ ,how many moles of aluminum chloride are produced? 2Al + 3Cl₂ → 2AlCl₃

In this reaction,what is the substance oxidized? Zn + 2 HCl → ZnCl2 + H2

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Exam 7: Chemical Quantities and Reactions

The ________ is the minimum energy needed for a chemical reaction to begin.

0.100 mole of lithium has a mass of ________.

For the following question(s),consider the following balanced equation. Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3 -What is the correct form of the conversion factor needed to convert the number of moles of H2O to the number of moles of NH3 produced?

What is the coefficient of hydrogen, H2 ,when the following equation is balanced? Al + H2SO4 → Al2(SO4)3+ ?H2

What is oxidized and what is reduced in the following reaction? 2Al + 3Br2 → 2AlBr3

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 O2 to the number of moles of Fe2O3 produced? 4Fe + 3O2 → 2Fe2O3

For the following question(s),consider the following equation. 2Mg + O2 → 2MgO -How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?

When 25.0 g of KClO3 reacts,how many grams of O2 are produced? 2KClO3 → 2KCl + 3O2

What type of reaction is: + 2 → + 2 O + 218 kcal?

Answer the question(s)below about the following reaction. 2 → 2 O + -How many moles of oxygen gas can 5.0 moles of hydrogen peroxide ( H2O2)produce,if decomposition is complete?

For the following question(s),consider the following balanced equation. Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3 -When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl2 ,how many moles of aluminum chloride are produced? 2Al + 3Cl2 → 2AlCl3

In this reaction,what is the substance oxidized? Zn + 2 HCl → ZnCl2 + H2

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

Amino Acids, proteins, and Enzymes

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Metabolic Pathways and Energy Production

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For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -What is the correct form of the conversion factor needed to convert the number of moles of H₂O to the number of moles of NH₃ produced?

What is the coefficient of hydrogen, H₂ ,when the following equation is balanced? Al + H₂SO₄ → Al₂(SO₄)₃+ ?H₂

What is oxidized and what is reduced in the following reaction? 2Al + 3Br₂ → 2AlBr₃

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of O₂ to the number of moles of Fe₂O₃ produced? 4Fe + 3O₂ → 2Fe₂O₃

For the following question(s),consider the following equation. 2Mg + O₂ → 2MgO -How many grams of MgO are produced when 40.0 grams of O₂ react completely with Mg?

When 25.0 g of KClO₃ reacts,how many grams of O₂ are produced? 2KClO₃ → 2KCl + 3O₂

For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl₂ ,how many moles of aluminum chloride are produced? 2Al + 3Cl₂ → 2AlCl₃