Question 1

In the reaction Zn + Cu(NO3)2 → Cu + Zn(NO3), the Zn is reduced.

Accepted Answer

A) True 
 B)False

Question 2

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

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 3

The oxidation number of cesium (Cs)is always +1.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is a single replacement reaction?

Accepted Answer

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

Question 5

Which ions will appear in the total ionic equation for the following reaction?

Accepted Answer

A)    and   
B)    and   
C)    ,   , and H+ 
D)    ,   ,   , and   
A)    and   
B)    and   
C)    ,   , and H+ 
D)    ,   ,   , and

Question 6

Given the equation 2CO + O2 → 2CO2, how many grams of CO2 form if 34.0 grams of CO are combined with excess oxygen?

Accepted Answer

A) 53.4 
B) 21.6 
C) 145 
D) 107 
A) 53.4 
B) 21.6 
C) 145 
D) 107

Question 7

In which of the following does an element have an oxidation number of +4?

Accepted Answer

A) TiO2 
B) HBr 
C) SO3 
D)    
A) TiO2 
B) HBr 
C) SO3 
D)

Question 8

Which of the following contains the metal with the highest oxidation number?

Accepted Answer

A) CaCl2 
B) NaCl 
C) FeCl3 
D) CuCl2 
A) CaCl2 
B) NaCl 
C) FeCl3 
D) CuCl2

Question 9

How many grams of N2 are required to completely react with 3.03 grams of H2 for the following balanced chemical equation?      N2 + 3H2 → 2NH3

Accepted Answer

A) 1.00 
B) 6.00 
C) 14.0 
D) 28.0 
A) 1.00 
B) 6.00 
C) 14.0 
D) 28.0

Question 10

Oxygen can be prepared in the lab by heating potassium chlorate in the presence of a catalyst. The reaction is 2KClO3 → 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 11

The following would represent what type of chemical reaction?

Accepted Answer

A) decomposition. 
B) combination. 
C) single replacement. 
D) double replacement. 
A) decomposition. 
B) combination. 
C) single replacement. 
D) double replacement.

Question 12

The reactions NaOH + HCl → H2O + NaCl and Ca(OH)2 + 2HBr → 2H2O + CaBr2 have the same net ionic equation.

Accepted Answer

A) True 
 B)False

Question 13

Propane, C3H8, burns to produce carbon dioxide and water by the equation below. What is the coefficient in front of the carbon dioxide in the balanced equation? C3H8 + O2 → CO2 + H2O

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

In the real world, one should not expect to obtain as much product as can be predicted from the stoichiometric calculation.

Accepted Answer

A) True 
 B)False

Question 16

What substance is oxidized in the following reaction? 4HCl + MnO2 → Cl2 + 2H2O + MnCl2

Accepted Answer

A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2 
A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2

Question 17

​ What is the sum of the oxidation numbers of all the atoms in the compound formula K 2 CO 3 ?

Accepted Answer

A) −2 
B) 0 
C) −1 
D) ​+1 
A) −2 
B) 0 
C) −1 
D) ​+1

Question 18

In the reaction 2H2O → 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 19

Which is not a meaning of oxidation?

Accepted Answer

A) to gain electrons 
B) to lose hydrogen 
C) to combine with oxygen 
D) to lose electrons 
A) to gain electrons 
B) to lose hydrogen 
C) to combine with oxygen 
D) to lose electrons

Question 20

Which of the following equations (not balanced)represents an oxidation-reduction process?

Accepted Answer

A) AgNO3 + NaCl → AgCl + NaNO3 
B) C + O2 → CO2 
C) C2H4 + O2 → CO2 + H2O 
D) more than one response is correct 
A) AgNO3 + NaCl → AgCl + NaNO3 
B) C + O2 → CO2 
C) C2H4 + O2 → CO2 + H2O 
D) more than one response is correct

Exam 5: Chemical Reactions

In the reaction Zn + Cu(NO3)2 → Cu + Zn(NO3), the Zn is reduced.

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

The oxidation number of cesium (Cs)is always +1.

Which of the following is a single replacement reaction?

Which ions will appear in the total ionic equation for the following reaction?

Given the equation 2CO + O2 → 2CO2, how many grams of CO2 form if 34.0 grams of CO are combined with excess oxygen?

In which of the following does an element have an oxidation number of +4?

Which of the following contains the metal with the highest oxidation number?

How many grams of N2 are required to completely react with 3.03 grams of H2 for the following balanced chemical equation? N2 + 3H2 → 2NH3

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

The following would represent what type of chemical reaction?

The reactions NaOH + HCl → H2O + NaCl and Ca(OH)2 + 2HBr → 2H2O + CaBr2 have the same net ionic equation.

Propane, C3H8, burns to produce carbon dioxide and water by the equation below. What is the coefficient in front of the carbon dioxide in the balanced equation? C3H8 + O2 → CO2 + H2O

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

In the real world, one should not expect to obtain as much product as can be predicted from the stoichiometric calculation.

What substance is oxidized in the following reaction? 4HCl + MnO2 → Cl2 + 2H2O + MnCl2

​ What is the sum of the oxidation numbers of all the atoms in the compound formula K 2 CO 3 ?

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

Which is not a meaning of oxidation?

Which of the following equations (not balanced)represents an oxidation-reduction process?

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In the reaction Zn + Cu(NO₃)₂ → Cu + Zn(NO₃), the Zn is reduced.

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

Given the equation 2CO + O₂ → 2CO₂, how many grams of CO₂ form if 34.0 grams of CO are combined with excess oxygen?

How many grams of N₂ are required to completely react with 3.03 grams of H₂ for the following balanced chemical equation? N₂ + 3H₂ → 2NH₃

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

The reactions NaOH + HCl → H₂O + NaCl and Ca(OH)₂ + 2HBr → 2H₂O + CaBr₂ have the same net ionic equation.

Propane, C₃H₈, burns to produce carbon dioxide and water by the equation below. What is the coefficient in front of the carbon dioxide in the balanced equation? C₃H₈ + O₂ → CO₂ + H₂O

Which species would be considered a spectator ion based on the following equation? Ba²⁺ + 2NO₃⁻ + 2Na⁺ + SO₄²⁺ → BaSO_4(s) + 2NO₃⁻ + 2Na⁺

What substance is oxidized in the following reaction? 4HCl + MnO₂ → Cl₂ + 2H₂O + MnCl₂

What is the sum of the oxidation numbers of all the atoms in the compound formula K ₂ CO ₃ ?

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