Question 1

When the equation,___O2 + ___C5H12 → ___CO2 + ___H2O is balanced,the coefficient: of O2 is:

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 8 
E) none of the above 
A) 3 
B) 4 
C) 5 
D) 8 
E) none of the above

Question 2

Combustion reactions emit heat and so can be classified as endothermic.

Accepted Answer

A) True 
 B)False

Question 3

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

Accepted Answer

A) H+ + Cl- + K+ + OH- → H2O + K+ + Cl- 
B) H+ + Cl- + K+ + OH- → 2H+ + O2- + K+ + Cl- 
C) H+ + OH- → H2O 
D) 2H+ +2Cl- + K2+ + 2OH- → H2O + K2+ +2 Cl- 
E) none of the above 
A) H+ + Cl- + K+ + OH- → H2O + K+ + Cl- 
B) H+ + Cl- + K+ + OH- → 2H+ + O2- + K+ + Cl- 
C) H+ + OH- → H2O 
D) 2H+ +2Cl- + K2+ + 2OH- → H2O + K2+ +2 Cl- 
E) none of the above

Question 4

Precipitation reactions always occur when two aqueous solutions are mixed.

Accepted Answer

A) True 
 B)False

Question 5

In an oxidation-reduction reaction,if one substance loses electrons,then another substance must gain electrons.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following compounds is INSOLUBLE?

Accepted Answer

A) magnesium phosphate 
B) magnesium sulfate 
C) magnesium iodide 
D) magnesium nitrate 
E) none of the above 
A) magnesium phosphate 
B) magnesium sulfate 
C) magnesium iodide 
D) magnesium nitrate 
E) none of the above

Question 7

All ionic compounds dissolve in water.

Accepted Answer

A) True 
 B)False

Question 8

Mixing HNO3 (aq)and NaHCO3 (aq)will produce carbon dioxide gas as a product.

Accepted Answer

A) True 
 B)False

Question 9

When balancing a chemical equation you may alter the coefficients but not the subscripts in the equation.

Accepted Answer

A) True 
 B)False

Question 10

It has been shown that the ozone molecule (O3)can be formed when a single oxygen atom (O)adds to a molecule of oxygen (O2),so this type of reaction is known as a double displacement reaction.

Accepted Answer

A) True 
 B)False

Question 11

Decomposition reactions usually require energy to initiate the reaction.

Accepted Answer

A) True 
 B)False

Question 12

A precipitation reaction will occur when sodium chloride is mixed with potassium nitrate.

Accepted Answer

A) True 
 B)False

Question 13

When compounds containing polyatomic ions dissolve,the polyatomic ions usually dissolve as intact units.

Accepted Answer

A) True 
 B)False

Question 14

Evidence of a redox reaction is when a substance reacts with elemental oxygen.

Accepted Answer

A) True 
 B)False

Question 15

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

Accepted Answer

A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction 
A) precipitation 
B) acid-base neutralization 
C) oxidation-reduction 
D) gas evolution 
E) no reaction

Question 16

What are the coefficients for the following reaction when it is properly balanced? ___nitric acid + ___sodium hydroxide → ___sodium nitrate + ___water

Accepted Answer

A) 2,1,1,1 
B) 2,3,2,2 
C) 5,2,2,1 
D) 1,1,1,1 
E) none of the above 
A) 2,1,1,1 
B) 2,3,2,2 
C) 5,2,2,1 
D) 1,1,1,1 
E) none of the above

Question 17

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

Accepted Answer

A) sulfides 
B) carbonates 
C) hydroxides 
D) bisulfites 
E) none of the above 
A) sulfides 
B) carbonates 
C) hydroxides 
D) bisulfites 
E) none of the above

Question 18

The reaction of baking soda and vinegar to produce carbon dioxide gas is an example of a precipitation reaction.

Accepted Answer

A) True 
 B)False

Question 19

The formation of a gas is evidence of a chemical reaction while the emission of light is not.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following compounds is SOLUBLE?

Accepted Answer

A) aluminum hydroxide 
B) aluminum sulfide 
C) aluminum carbonate 
D) aluminum sulfate 
E) none of the above 
A) aluminum hydroxide 
B) aluminum sulfide 
C) aluminum carbonate 
D) aluminum sulfate 
E) none of the above

When the equation,_O₂+ _C₅H₁₂ → _CO₂ + _H₂Ois balanced,the coefficient: of O₂is:

Combustion reactions emit heat and so can be classified as endothermic.

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

Precipitation reactions always occur when two aqueous solutions are mixed.

In an oxidation-reduction reaction,if one substance loses electrons,then another substance must gain electrons.

Which of the following compounds is INSOLUBLE?

All ionic compounds dissolve in water.

Mixing HNO₃ (aq)and NaHCO₃ (aq)will produce carbon dioxide gas as a product.

When balancing a chemical equation you may alter the coefficients but not the subscripts in the equation.

It has been shown that the ozone molecule (O₃)can be formed when a single oxygen atom (O)adds to a molecule of oxygen (O₂),so this type of reaction is known as a double displacement reaction.

Decomposition reactions usually require energy to initiate the reaction.

A precipitation reaction will occur when sodium chloride is mixed with potassium nitrate.

When compounds containing polyatomic ions dissolve,the polyatomic ions usually dissolve as intact units.

Evidence of a redox reaction is when a substance reacts with elemental oxygen.

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

What are the coefficients for the following reaction when it is properly balanced? _nitric acid + _sodium hydroxide → _sodium nitrate + _water

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

The reaction of baking soda and vinegar to produce carbon dioxide gas is an example of a precipitation reaction.

The formation of a gas is evidence of a chemical reaction while the emission of light is not.

Which of the following compounds is SOLUBLE?

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Exam 7: Chemical Reactions

When the equation,___O2 + ___C5H12 → ___CO2 + ___H2O is balanced,the coefficient: of O2 is:

Combustion reactions emit heat and so can be classified as endothermic.

What is the complete ionic equation for the reaction of hydrochloric acid with potassium hydroxide?

Precipitation reactions always occur when two aqueous solutions are mixed.

In an oxidation-reduction reaction,if one substance loses electrons,then another substance must gain electrons.

Which of the following compounds is INSOLUBLE?

All ionic compounds dissolve in water.

Mixing HNO3 (aq)and NaHCO3 (aq)will produce carbon dioxide gas as a product.

When balancing a chemical equation you may alter the coefficients but not the subscripts in the equation.

It has been shown that the ozone molecule (O3)can be formed when a single oxygen atom (O)adds to a molecule of oxygen (O2),so this type of reaction is known as a double displacement reaction.

Decomposition reactions usually require energy to initiate the reaction.

A precipitation reaction will occur when sodium chloride is mixed with potassium nitrate.

When compounds containing polyatomic ions dissolve,the polyatomic ions usually dissolve as intact units.

Evidence of a redox reaction is when a substance reacts with elemental oxygen.

What type of a reaction occurs when a silver nitrate solution is mixed with sodium chloride solution?

What are the coefficients for the following reaction when it is properly balanced? ___nitric acid + ___sodium hydroxide → ___sodium nitrate + ___water

Which of the following types of compounds will NOT undergo a gas evolution reaction when acid is added?

The reaction of baking soda and vinegar to produce carbon dioxide gas is an example of a precipitation reaction.

The formation of a gas is evidence of a chemical reaction while the emission of light is not.

Which of the following compounds is SOLUBLE?

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

When the equation,_O₂+ _C₅H₁₂ → _CO₂ + _H₂Ois balanced,the coefficient: of O₂is:

Mixing HNO₃ (aq)and NaHCO₃ (aq)will produce carbon dioxide gas as a product.

It has been shown that the ozone molecule (O₃)can be formed when a single oxygen atom (O)adds to a molecule of oxygen (O₂),so this type of reaction is known as a double displacement reaction.

What are the coefficients for the following reaction when it is properly balanced? _nitric acid + _sodium hydroxide → _sodium nitrate + _water