Question 1

All redox reactions involve oxygen.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is a single replacement reaction?

Accepted Answer

A) CuO + H2 $\rightarrow$ Cu + H2O 
B) HBr + KOH$\rightarrow$ H2O + KBr 
C) SO2 + H2O $\rightarrow$H2SO3 
D) 2HI $\rightarrow$I2 + H2 
A) CuO + H2 $\rightarrow$ Cu + H2O 
B) HBr + KOH$\rightarrow$ H2O + KBr 
C) SO2 + H2O $\rightarrow$H2SO3 
D) 2HI $\rightarrow$I2 + H2

Question 3

Redox reactions may also be a decomposition reaction.

Accepted Answer

A) True 
 B)False

Question 4

Consider the reactants in the partial equation given.Which choice is a product? H3PO4 + Sr(OH)2 $\rightarrow$_______

Accepted Answer

A) no reaction 
B) SrH3PO5 
C) SrH5PO6 
D) Sr3(PO4)2 
A) no reaction 
B) SrH3PO5 
C) SrH5PO6 
D) Sr3(PO4)2

Question 5

Integers are used in properly balanced chemical equations because whole moles of substances are needed for a reaction.

Accepted Answer

A) True 
 B)False

Question 6

Barium sulfate is often ingested to aid in the diagnosis of GI tract disorders.The equation for its production is Ba2+ + SO$\rightarrow$BaSO4(s).What type of equation is this?

Accepted Answer

A) a total ionic equation 
B) a full equation 
C) an oxidation-reduction equation 
D) a net ionic equation 
A) a total ionic equation 
B) a full equation 
C) an oxidation-reduction equation 
D) a net ionic equation

Question 7

The reaction Mg + 3N2 $\rightarrow$Mg3N2 is correctly balanced as written.

Accepted Answer

A) True 
 B)False

Question 8

Tincture of iodine is an antiseptic.Which of the following is another antiseptic?

Accepted Answer

A) 5% sodium hypochlorite 
B) 3% hydrogen peroxide 
C) ozone 
D) All are antiseptics 
A) 5% sodium hypochlorite 
B) 3% hydrogen peroxide 
C) ozone 
D) All are antiseptics

Question 9

The Haber Process is a method for the production of ammonia,an important chemical intermediate.The reaction for this process is N2 + 3H2 $\rightarrow$ 2NH3
According to the mole interpretation,how many grams of NH3 could be produced by the complete reaction of 2.80 grams of N2 and excess H2?

Accepted Answer

A) 34.0 
B) 17.0 
C) 3.10 
D) 3.40 
A) 34.0 
B) 17.0 
C) 3.10 
D) 3.40

Question 10

The Haber Process is a method for the production of ammonia,an important chemical intermediate.The reaction for this process is: N2 + 3H2 $\rightarrow$ 2NH3.When the equation is correctly interpreted in terms of moles,how many moles of H2 will react with one mole of N2?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 6 
A) 1 
B) 2 
C) 3 
D) 6

Question 11

Oxygen can be prepared in the lab by heating potassium chlorate in the presence of a catalyst.The reaction is 2KClO3  $\rightarrow$2KCl + 3O2.How many moles of O2 could be obtained from one mole of KClO3?

Accepted Answer

A) 1.5 
B) 3.0 
C) 1.0 
D) 2.0 
A) 1.5 
B) 3.0 
C) 1.0 
D) 2.0

Question 12

What is the oxidation number of Cl in HClO3?

Accepted Answer

A) +2 
B) +3 
C) +4 
D) +5 
A) +2 
B) +3 
C) +4 
D) +5

Question 13

In the equation for an endothermic reaction,the word "heat" appears

Accepted Answer

A) on the right side. 
B) on the left side. 
C) on both sides. 
D) on neither side. 
A) on the right side. 
B) on the left side. 
C) on both sides. 
D) on neither side.

Question 14

Products are always on the right side of a chemical equation.

Accepted Answer

A) True 
 B)False

Question 15

Which species would be considered a spectator ion based on the following equation? Ba2+ + 2NO3 -  + 2Na+ + SO42+ $\rightarrow$BaSO4(s) + 2NO3 - + 2Na+

Accepted Answer

A) Ba2+ 
B) SO42+ 
C) BaSO4 
D) 2NO3 - 
A) Ba2+ 
B) SO42+ 
C) BaSO4 
D) 2NO3 -

Question 16

In the reaction 2H2O $\rightarrow$2H2 + O2,2.0 mol water will produce how many grams of O2?

Accepted Answer

A) 16 
B) 32 
C) 36 
D) 64 
A) 16 
B) 32 
C) 36 
D) 64

Question 17

Acetylene,C2H2,burns according to the following reaction: C2H2+5O2 $\rightarrow$4CO2+2H2O.Suppose 1.20 g of C2H2 is mixed with 3.50 g of O2 in a closed,steel container,and the mixture is ignited.What substances will be found in the mixture left when the burning is complete?

Accepted Answer

A) CO2 and H2 
B) O2,CO2,and H2O 
C) C2H2,CO2,and H2O 
D) O2,C2H2,CO2,and H2O 
A) CO2 and H2 
B) O2,CO2,and H2O 
C) C2H2,CO2,and H2O 
D) O2,C2H2,CO2,and H2O

Question 18

In the reaction 2CH4 + O2 $\rightarrow$ 2CO + 4H2,how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH4?

Accepted Answer

A) 12.0 *1023 
B) 3.01 * 1022 
C) 6.02 * 1022 
D) 2.00 
A) 12.0 *1023 
B) 3.01 * 1022 
C) 6.02 * 1022 
D) 2.00

Question 19

The batteries in an automobile contain lead plates,water,PbSO4 and H2SO4.The instructions with a battery charger state that when a car battery is being charged,there must be no flames or sparks.Hydrogen is liberated during the process and might explode on ignition.Therefore,the hydrogen released is an indication that a redox reaction occurs during the charging process.

Accepted Answer

A) True 
 B)False

Question 20

If 5 grams of CO and 5 grams of O2 are combined according to the reaction,which is the limiting reagent? 2CO + O2$\rightarrow$ 2CO2

Accepted Answer

A) CO2 
B) O2 
C) CO 
D) CO and O2 
A) CO2 
B) O2 
C) CO 
D) CO and O2

Exam 5: Chemical Reactions

All redox reactions involve oxygen.

Which of the following is a single replacement reaction?

Redox reactions may also be a decomposition reaction.

Consider the reactants in the partial equation given.Which choice is a product? H3PO4 + Sr(OH)2 →\rightarrow→ _______

Integers are used in properly balanced chemical equations because whole moles of substances are needed for a reaction.

Barium sulfate is often ingested to aid in the diagnosis of GI tract disorders.The equation for its production is Ba2+ + SO →\rightarrow→ BaSO4(s).What type of equation is this?

The reaction Mg + 3N2 →\rightarrow→ Mg3N2 is correctly balanced as written.

Tincture of iodine is an antiseptic.Which of the following is another antiseptic?

The Haber Process is a method for the production of ammonia,an important chemical intermediate.The reaction for this process is N2 + 3H2 →\rightarrow→ 2NH3 According to the mole interpretation,how many grams of NH3 could be produced by the complete reaction of 2.80 grams of N2 and excess H2?

The Haber Process is a method for the production of ammonia,an important chemical intermediate.The reaction for this process is: N2 + 3H2 →\rightarrow→ 2NH3.When the equation is correctly interpreted in terms of moles,how many moles of H2 will react with one mole of N2?

Oxygen can be prepared in the lab by heating potassium chlorate in the presence of a catalyst.The reaction is 2KClO3 →\rightarrow→ 2KCl + 3O2.How many moles of O2 could be obtained from one mole of KClO3?

What is the oxidation number of Cl in HClO3?

In the equation for an endothermic reaction,the word "heat" appears

Products are always on the right side of a chemical equation.

Which species would be considered a spectator ion based on the following equation? Ba2+ + 2NO3 - + 2Na+ + SO42+ →\rightarrow→ BaSO4(s) + 2NO3 - + 2Na+

In the reaction 2H2O →\rightarrow→ 2H2 + O2,2.0 mol water will produce how many grams of O2?

Acetylene,C2H2,burns according to the following reaction: C2H2+5O2 →\rightarrow→ 4CO2+2H2O.Suppose 1.20 g of C2H2 is mixed with 3.50 g of O2 in a closed,steel container,and the mixture is ignited.What substances will be found in the mixture left when the burning is complete?

In the reaction 2CH4 + O2 →\rightarrow→ 2CO + 4H2,how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH4?

If 5 grams of CO and 5 grams of O2 are combined according to the reaction,which is the limiting reagent? 2CO + O2 →\rightarrow→ 2CO2

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

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Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

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Filters

Consider the reactants in the partial equation given.Which choice is a product? H₃PO₄ + Sr(OH)₂ $\rightarrow$ _______

Barium sulfate is often ingested to aid in the diagnosis of GI tract disorders.The equation for its production is Ba²⁺ + SO $\rightarrow$ BaSO₄(s).What type of equation is this?

The reaction Mg + 3N₂ $\rightarrow$ Mg₃N₂ is correctly balanced as written.

The Haber Process is a method for the production of ammonia,an important chemical intermediate.The reaction for this process is: N₂ + 3H₂ $\rightarrow$ 2NH₃.When the equation is correctly interpreted in terms of moles,how many moles of H₂ will react with one mole of N₂?

Oxygen can be prepared in the lab by heating potassium chlorate in the presence of a catalyst.The reaction is 2KClO₃ $\rightarrow$ 2KCl + 3O₂.How many moles of O₂ could be obtained from one mole of KClO₃?

What is the oxidation number of Cl in HClO₃?

Which species would be considered a spectator ion based on the following equation? Ba²⁺+ 2NO₃ ^- + 2Na⁺ + SO₄²⁺ $\rightarrow$ BaSO_4(s) + 2NO₃ ^- + 2Na⁺

In the reaction 2H₂O $\rightarrow$ 2H₂ + O₂,2.0 mol water will produce how many grams of O₂?

Acetylene,C₂H₂,burns according to the following reaction: C₂H₂+5O₂ $\rightarrow$ 4CO₂+2H₂O.Suppose 1.20 g of C₂H₂ is mixed with 3.50 g of O₂ in a closed,steel container,and the mixture is ignited.What substances will be found in the mixture left when the burning is complete?

In the reaction 2CH₄ + O₂ $\rightarrow$ 2CO + 4H₂,how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH₄?

If 5 grams of CO and 5 grams of O₂ are combined according to the reaction,which is the limiting reagent? 2CO + O₂ $\rightarrow$ 2CO₂