Deck 4: Chemical Reactions and Stoichiometry

Question 1

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO₂ and H₂O in the balanced reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂⁻(aq)+ O₂(g)

A)ClO₂ = 1,H₂O = 1
B)ClO₂ = 1,H₂O = 2
C)ClO₂ = 4,H₂O = 3
D)ClO₂ = 4,H₂O = 2
E)ClO₂ = 2,H₂O = 2

Answer 1

ClO₂ = 2,H₂O = 2

Question 2

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺ and Fe³⁺ in the balanced reaction? Fe²⁺(aq)+ MnO₄^- (aq)→ Fe³⁺(aq)+ Mn²⁺(aq)

A)H⁺ = 2,Fe³⁺ = 3
B)H⁺ = 8,Fe³⁺ = 5
C)H⁺ = 3,Fe³⁺ = 2
D)H⁺ = 5,Fe³⁺ = 1
E)H⁺ = 8,Fe³⁺ = 1

Answer 2

H⁺ = 8,Fe³⁺ = 5

Question 3

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H₂C₂O₄ and H₂O in the balanced reaction? MnO₄^- (aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

A)H₂C₂O₄ = 5,H₂O = 8
B)H₂C₂O₄ = 1,H₂O = 1
C)H₂C₂O₄ = 5,H₂O = 1
D)H₂C₂O₄ = 1,H₂O = 4
E)H₂C₂O₄ = 3,H₂O = 2

Answer 3

H₂C₂O₄ = 5,H₂O = 8

Question 4

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Zn and H⁺ in the balanced reaction? Zn²⁺(aq)+ NH₄⁺(aq)→ Zn(s)+ NO₃^- (aq)

A)Zn = 1,H⁺ = 8
B)Zn = 1,H⁺ = 4
C)Zn = 4,H⁺ = 10
D)Zn = 2,H⁺ = 4
E)Zn = 3,H⁺ = 5

Question 5

What element is being oxidized in the following (unbalanced)redox reaction? Cr(OH)₄^- (aq)+ ClO^- (aq)→ CrO₄^2- (aq)+ Cl^- (aq)

A)Cr
B)O
C)H
D)Cl

Question 6

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)₄^- and ClO^- in the balanced reaction? Cr(OH)₄^- (aq)+ ClO^- (aq)→ CrO₄^2- (aq)+ Cl^- (aq)

A)Cr(OH)₄^- = 2,ClO^- = 3
B)Cr(OH)₄^- = 1,ClO^- = 1
C)Cr(OH)₄^- = 1,ClO^- = 2
D)Cr(OH)₄^- = 2,ClO^- = 6
E)Cr(OH)₄^- = 6,ClO^- = 5

Question 7

Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Cd and Ag⁺ in the balanced reaction? Cd(s)+ Ag⁺(aq)→ Ag(s)+ Cd²⁺(aq)

A)Cd = 1,Ag⁺ = 2
B)Cd = 1,Ag⁺ = 1
C)Cd = 2,Ag⁺ = 1
D)Cd = 2,Ag⁺ = 2
E)Cd = 3,Ag⁺ = 1

Question 8

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Al and F₂ in the balanced reaction? Al(s)+ F₂(g)→ Al³⁺(aq)+ F^-(aq)

A)Al = 2,F₂ = 3
B)Al = 2,F₂ = 6
C)Al = 1,F₂ = 1
D)Al = 2,F₂ = 1
E)Al = 3,F₂ = 2

Question 9

Identify the location of reduction in an electrochemical cell.

A)the anode
B)the cathode
C)the electrode
D)the salt bridge
E)the socket

Question 10

Identify the location of oxidation in an electrochemical cell.

A)the anode
B)the cathode
C)the electrode
D)the salt bridge
E)the socket

Question 11

Which of the following statements is TRUE?

A)A reduction process corresponds to an increase in oxidation state as a result of loss of electrons.
B)An oxidation process involves the loss of electrons resulting in an increase in oxidation state.
C)An oxidation process corresponds to a decrease in oxidation state as a result of a gain of electrons.
D)During a reduction process electrons are lost,while during an oxidation they are gained.
E)During a reduction process an oxidation state increases,while in an oxidation process an oxidation state decreases.

Question 12

What element is being oxidized in the following (unbalanced)redox reaction? MnO₄^- (aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

A)C
B)O
C)Mn
D)H

Question 13

What element is being oxidized in the following (unbalanced)redox reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂^- (aq)+ O₂(g)

A)H
B)O
C)Cl
D)N
E)C

Question 14

What element is being oxidized in the following (unbalanced)redox reaction? Zn²⁺(aq)+ NH₄⁺(aq)→ Zn(s)+ NO₃^- (aq)

A)Zn
B)N
C)H
D)O

Question 15

Define a salt bridge.

A)A pathway,composed of salt water,that ions pass through.
B)A pathway in which no ions flow.
C)A pathway between the cathode and anode in which ions are reduced.
D)A pathway between the cathode and anode in which ions are oxidized.
E)A pathway through which counterions can flow between the half-cells without the solutions in the half-cell totally mixing.

Question 16

What element is being reduced in the following (unbalanced)redox reaction? H₂O₂(l)+ ClO₂(aq)→ ClO₂^- (aq)+ O₂(g)

A)H
B)O
C)Cl
D)N
E)C

Question 17

How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Mg(s)+ Al³⁺(aq)→ Al(s)+ Mg²⁺(aq)

A)6
B)2
C)3
D)1
E)4

Question 18

What element is being reduced in the following (unbalanced)redox reaction? Cr(OH)₄^- (aq)+ ClO^- (aq)→ CrO₄^2- (aq)+ Cl^- (aq)

A)Cr
B)O
C)H
D)Cl

Question 19

Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Br₂ and OH^- in the balanced reaction? Br₂(l)→ BrO₃^- (aq)+ Br^- (aq)

A)Br₂ = 1,OH^- = 2
B)Br₂ = 2,OH^- = 5
C)Br₂ = 3,OH^- = 3
D)Br₂ = 3,OH^- = 6
E)Br₂ = 1,OH^- = 6

Question 20

What element is being reduced in the following (unbalanced)redox reaction? MnO₄^- (aq)+ H₂C₂O₄(aq)→ Mn²⁺(aq)+ CO₂(g)

A)C
B)O
C)Mn
D)H

Question 21

What are the required coefficients to properly balance the following chemical reaction? SO₂(g)+ O₂(g)+ H₂O(l)→ H₂SO₄(aq)

A)1,1,1,1
B)1,2,1,2
C)1,2,2,1
D)2,1,2,2
E)2,1,1,2

Question 22

What are the required coefficients to properly balance the following chemical reaction? Cu(s)+ S(s)? Cu₂S(s)

A)1,1, $\frac { 1 } { 2 }$
B)1,1,1
C)1,1,2
D)2,1,1
E)2,1,2

Question 23

Which of the following is considered a strong electrolyte?

A)NH₄NO₃
B)C₁₂H₂₂O₁₁
C)PbCl₂
D)HC₂H₃O₂
E)CH₃OH

Question 24

What are the required coefficients to properly balance the following chemical reaction? C₆H₁₂O₆(s)+ O₂(g)→ CO₂(g)+ H₂O(l)

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

Question 25

Identify the balanced equation to show the reaction of sulfurous acid with lithium hydroxide to form water and lithium sulfite.

A)H₂SO₄(aq)+ LiOH(aq)→ H₂O(l)+ Li₂SO₄(aq)
B)H₂SO₃(aq)+ 2LiOH(aq)→ 2H₂O(l)+ Li₂SO₃(aq)
C)HSO₃(aq)+ LiOH(aq)→ H₂O(l)+ LiSO₃(aq)
D)HSO₄(aq)+ LiOH(aq)→ H₂O(l)+ LiSO₄(aq)
E)H₂S(aq)+ 2LiOH(aq)→ 2H₂O(l)+ Li₂S(aq)

Question 26

Which of the following describes acetic acid?

A)strong electrolyte,weak acid
B)weak electrolyte,weak acid
C)strong electrolyte,strong acid
D)weak electrolyte,strong acid
E)nonelectrolyte

Question 27

What are the required coefficients to properly balance the following chemical reaction? Na(s)+ H₂O(l)→ H₂(g)+ NaOH(aq)

A)1,2,2,1
B)2,2,1,1
C)2,1,1,1
D)2,1,2,1
E)2,2,1,2

Question 28

What are the required coefficients to properly balance the following chemical reaction? H₂(g)+ Cl₂(g)→ HCl(g)

A)1,1,2
B)2,2,
C)1,1,1
D)2,1,2
E)1,2,1

Question 29

Which of the following describes HCl?

A)strong electrolyte,weak acid
B)weak electrolyte,weak acid
C)strong electrolyte,strong acid
D)weak electrolyte,strong acid
E)nonelectrolyte

Question 30

What are the required coefficients to properly balance the following chemical reaction? CH₄(g)+ H₂O(g)→ CO(g)+ H₂(g)

A)1,2,2,3
B)1,1,2,2
C)2,1,1,3
D)2,2,1,1
E)1,1,1,3

Question 31

Which of the following is a weak electrolyte?

A)LiOH
B)CaCl₂
C)MgCO₃
D)NaC₂H₃O₂
E)Li₂SO₄

Question 32

What are the required coefficients to properly balance the following chemical reaction? N₂H₄(l)→ NH₃(g)+ N₂(g)

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

Question 33

What are the required coefficients to properly balance the following chemical reaction? MnCl₂(s)+ H₂O(l)+ Cl₂(g)→ HCl(aq)+ MnO₂(s)

A)1,2,1,4,1
B)2,2,1,4,2
C)1,1,1,2,1
D)1,1,1,4,1
E)2,1,1,4,2

Question 34

Which of the following describes sugar?

A)strong electrolyte,weak acid
B)weak electrolyte,weak acid
C)strong electrolyte,strong acid
D)weak electrolyte,strong acid
E)nonelectrolyte

Question 35

Identify the balanced equation to show the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate.

A)Al(C₂H₃O₂)₂(aq)+ (NH₄)₂PO₄(aq)→ AlPO₄(s)+ 2NH₄C₂H₃O₂(aq)
B)Al(C₂H₃O₂)₂(aq)+ (NH₃)₂PO₄(aq)→ AlPO₄(s)+ 2NH₃C₂H₃O₂(aq)
C)Al(CO₃)₂(aq)+ (NH₃)₂PO₄(aq)→ AlPO₄(s)+ 2NH₃CO₃(aq)
D)Al(C₂H₃O₂)₃(aq)+ (NH₄)₃PO₄(aq)→ AlPO₄(s)+ 3NH₄C₂H₃O₂(aq)
E)Al(CO₂)₃(aq)+ (NH₄)₃PO₃(aq)→ AlPO₃(s)+ 3NH₄CO₂(aq)

Question 36

What are the required coefficients to properly balance the following chemical reaction? NO(g)+ H₂O(g)? NH₃(g)+ O₂(g)

A)4,6,4, $\frac { 5 } { 2 }$
B)4,6,4,5
C)2,3,2,2
D)2,3,2,3
E)4,4,6,6

Question 37

Choose the statement below that is TRUE.

A)A weak acid solution consists of mostly nonionized acid molecules.
B)The term "strong electrolyte" means that the substance is extremely reactive.
C)A strong acid solution consists of only partially ionized acid molecules.
D)The term "weak electrolyte" means that the substance is inert.
E)A molecular compound that does not ionize in solution is considered a strong electrolyte.

Question 38

What are the required coefficients to properly balance the following chemical reaction? PbS(s)+ HBr(aq)→ PbBr₂(s)+ H₂S(g)

A)1,1,2,2
B)1,2,1,1
C)1,2,2,1
D)2,1,1,1
E)2,2,1,2

Question 39

Which of the following describes NaCl?

A)weak acid
B)weak electrolyte
C)strong acid
D)strong electrolyte
E)nonelectrolyte

Question 40

Identify the balanced equation to show the reaction of gaseous ethane with gaseous oxygen to form carbon monoxide gas and water vapour.

A)2C₂H₆(g)+ 7O₂(g)→ 4CO₂(g)+ 6H₂O(g)
B)C₂H₆(g)+ 5O(g)→ 2CO(g)+ 3H₂O(g)
C)2C₂H₆(g)+ 5O₂(g)→ 4CO(g)+ 6H₂O(g)
D)C₂H₆(g)+ 7O(g)→ 2CO₂(g)+ 3H₂O(g)
E)2CH₃(g)+ 5O(g)→ 2CO(g)+ 3H₂O(g)

Question 41

Which of the following is a precipitation reaction?

A)
$2 \mathrm { HBr } ( a q ) + \mathrm { NiS } ( s ) \rightarrow \mathrm { NiBr } _ { 2 } ( a q ) + \mathrm { H } _ { 2 } \mathrm {~S} ( g )$
B) $\mathrm { NH } _ { 4 } \mathrm { I } ( a q ) + \mathrm { NaOH } ( a q ) \rightarrow \mathrm { H } _ { 2 } \mathrm { O } ( l ) + \mathrm { NH } _ { 3 } ( g ) + \mathrm { NaI } ( a q )$
C)
$2 \mathrm { C } _ { 4 } \mathrm { H } _ { 6 } ( g ) + 11 \mathrm { O } _ { 2 } ( g ) \rightarrow 8 \mathrm { CO } _ { 2 } ( g ) + 6 \mathrm { H } _ { 2 } \mathrm { O } ( g )$
D)
$4 \mathrm { NO } ( g ) + 6 \mathrm { H } _ { 2 } \mathrm { O } ( g ) \rightarrow 4 \mathrm { NH } _ { 3 } ( g ) + 5 \mathrm { O } _ { 2 } ( g )$
E) $\mathrm { CrBr } _ { 2 } ( a q ) + \mathrm { Na } _ { 2 } \mathrm { CO } _ { 3 } ( a q ) \rightarrow \mathrm { CrCO } _ { 3 } ( s ) + 2 \mathrm { NaBr } ( a q )$

Question 42

Identify the polyprotic acid.

A)H₂SO₄
B)HCl
C)NaCl
D)NaOH
E)Li(OH)₂

Question 43

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

A)NH₄NO₃ + Li₂CO₃
B)Hg₂(NO₃)₂ + LiI
C)NaCl + Li₃PO₄
D)AgC₂H₃O₂ + Cu(NO₃)₂
E)None of the above solution pairs will produce a precipitate.

Question 44

Find the volume of 0.110 mol L^-1 hydrochloric acid necessary to react completely with 1.52 g $\mathrm { Al } ( \mathrm { OH } ) _ { 3 }$ .

A)0.658 L
B)1.52 L
C)1.88 L
D)1.01 L
E)0.531 L

Question 45

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

A)HCl + LiOH
B)Li₂S + HCl
C)K₂CO₃ + HNO₃
D)MgCl₂ + KOH
E)All of these solution pairs will produce a precipitate.

Question 46

Identify the net ionic equation for the reaction (if any)that occurs when aqueous solutions of MgSO₃ and HI are mixed.

A)2H⁺(aq)+ SO₃^2-(aq)→ H₂SO₃(s)
B)Mg²⁺(aq)+ 2I^-(aq)→ MgI₂(s)
C)2H⁺(aq)+ SO₃^2-(aq)+ Mg²⁺(aq)+ 2I^-(aq)→ H₂SO₃(s)+ MgI₂(aq)
D)2H⁺(aq)+ SO₃^2-(aq)→ H₂O(l)+ SO₂(g)
E)No reaction occurs.

Question 47

Identify the spectator ions in the following molecular equation: KBr(aq)+ AgNO₃(aq)→ AgBr(s)+ KNO₃(aq)

A)Ag⁺ and Br^-
B)K⁺ and NO₃^-
C)K⁺ and Br^-
D)Ag⁺ and NO₃^-
E)There are no spectator ions in this reaction.

Question 48

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

A)K₂CO₃ + NaCl
B)Na₂SO₄ + KOH
C)CaS + Na₂SO₄
D)None of these solution pairs will produce a precipitate.
E)All of these solution pairs will produce a precipitate.

Question 49

Identify the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Na₂CO₃ and HCl are mixed.

A)2H⁺(aq)+ CO₃^2-(aq)→ H₂CO₃(s)
B)2Na⁺(aq)+ CO₃^2-(aq)+ 2H⁺(aq)+ 2Cl^-(aq)→ H₂CO₃(s)+ 2NaCl(aq)
C)2H⁺(aq)+ CO₃^2-(aq)→ H₂O(l)+ CO₂(g)
D)2Na⁺(aq)+ CO₃^2-(aq)+ 2H⁺(aq)+ 2Cl^-(aq)→ H₂CO₃(s)+ 2Na⁺(aq)+ 2Cl^-(aq)
E)No reaction occurs.

Question 50

How many of the following compounds are soluble in water? Cu(OH)₂ LiNO₃ NH₄Br K₂S

A)0
B)1
C)2
D)3
E)4

Question 51

Identify the complete ionic equation for the reaction (if any)that occurs when aqueous solutions of lithium sulfide and copper(II)nitrate are mixed.

A)Li⁺(aq)+ SO₄^2-(aq)+ Cu⁺(aq)+ NO₃^-(aq)→ CuS(s)+ Li⁺(aq)+ NO₃^-(aq)
B)Li⁺(aq)+ S^-(aq)+ Cu⁺(aq)+ NO₃^-(aq)→ CuS(s)+ LiNO₃(aq)
C)2Li⁺(aq)+ S^2-(aq)+ Cu²⁺(aq)+ 2NO₃^-(aq)→ Cu²⁺(aq)+ S^2-(aq)+ 2LiNO₃(s)
D)2Li⁺(aq)+ S^2-(aq)+ Cu²⁺(aq)+ 2NO₃^-(aq)→ CuS(s)+ 2Li⁺(aq)+ 2NO₃^-(aq)
E)No reaction occurs.

Question 52

Which of the following compounds is soluble in water?

A)CaCl₂
B)MgCO₃
C)PbCl₂
D)BaSO₄
E)None of these compounds is soluble in water.

Question 53

Identify the net ionic equation for the reaction (if any)that occurs when aqueous solutions of K₂S and Fe(NO₃)₂ are mixed.

A)K⁺(aq)+ NO₃^-(aq)→ KNO₃(s)
B)Fe²⁺(aq)+ S^2-(aq)+ 2K⁺(aq)+ 2NO₃^-(aq)→ FeS(s)+ 2K⁺(aq)+ 2NO₃^-(aq)
C)Fe²⁺(aq)+ S^2-(aq)+ 2K⁺(aq)+ 2NO₃^-(aq)→ Fe²⁺(aq)+ S^2-(aq)+ 2KNO₃(s)
D)Fe²⁺(aq)+ S^2-(aq)→ FeS(s)
E)No reaction occurs.

Question 54

How many of the following compounds are insoluble in water? KC₂H₃O₂ CaSO₄ SrS AlPO₄

A)0
B)1
C)2
D)3
E)4

Question 55

Which of the following compounds is insoluble in water?

A)Hg₂I₂
B)MgSO₄
C)(NH₄)₂CO₃
D)BaS
E)All of these compounds are soluble in water.

Question 56

What precipitate is most likely formed from a solution containing Ba²⁺,Na¹⁺,OH^1-,and CO₃^2-.

A)NaOH
B)BaCO₃
C)Na₂CO₃
D)Ba(OH)₂

Question 57

Which of the following is an acid-base reaction?

A)C(s)+ O₂(g)→ CO₂(g)
B)2HClO₄(aq)+ Ca(OH)₂(aq)→ 2 H₂O(l)+ Ca(ClO₄)₂(aq)
C)Fe(s)+ 2AgNO₃(aq)→ 2Ag(s)+ Fe(NO₃)₂(aq)
D)MgSO₄(aq)+ Ba(NO₃)₂(aq)→ Mg(NO₃)₂(aq)+ BaSO₄(s)
E)None of the above is an acid-base reaction.

Question 58

Which of the following is a precipitation reaction?

A)Zn(s)+ 2AgNO₃(aq)→ 2Ag(s)+ Zn(NO₃)₂(aq)
B)NaCl(aq)+ LiI(aq)→ NaI(aq)+ LiCl(aq)
C)2LiI(aq)+ Hg₂(NO₃)₂(aq)→ Hg₂I₂(s)+ 2LiNO₃(aq)
D)HCl(aq)+ KOH(aq)→ KCl(aq)+ H₂O(l)
E)None of the above are precipitation reactions.

Question 59

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

A)LiOH + Na₂S
B)(NH₄)₂SO₄ + LiCl
C)Sr(C₂H₃O₂)₂ + Na₂SO₄
D)KNO₃ + NaOH
E)None of the above solution pairs will produce a precipitate.

Question 60

Identify the net ionic equation for the reaction (if any)that occurs when aqueous solutions of H₂SO₄ and KOH are mixed.

A)H⁺(aq)+ OH^-(aq)→ H₂O(l)
B)2K⁺(aq)+ SO₄^2-(aq)→ K₂SO₄(s)
C)H⁺(aq)+ OH^-(aq)+ 2K⁺(aq)+ SO₄^2-(aq)→ H₂O(l)+ K₂SO₄(s)
D)H₂²⁺(aq)+ OH^-(aq)→ H₂(OH)₂(l)
E)No reaction occurs.

Question 61

Identify the oxidation state of Mg in Mg(s). Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)

A)+1
B)+2
C)0
D)-1
E)-2

Question 62

Determine the oxidation state of P in PO₃^3-.

A)+3
B)+6
C)+2
D)0
E)-3

Question 63

Which of the following is an oxidation-reduction reaction?

A)HCl(aq)+ LiOH(aq)→ LiCl(aq)+ H₂O(l)
B)NaI(aq)+ AgNO₃(aq)→ AgI(s)+ NaNO₃(aq)
C)Pb(C₂H₃O₂)₂(aq)+ 2NaCl(aq)→ PbCl₂(s)+ 2NaC₂H₃O₂(aq)
D)Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)
E)All of the above are oxidation-reduction reactions.

Question 64

Determine the oxidizing agent in the following reaction. Ni(s)+ 2AgClO₄(aq)→ Ni(ClO₄)₂(aq)+ 2Ag(s)

A)Ag⁺
B)Ni
C)Cl
D)O
E)This is not an oxidation-reduction reaction.

Question 65

Identify the oxidation state of H in HCl(aq). Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)

A)+1
B)+2
C)0
D)-1
E)-2

Question 66

Consider the following reaction.How many moles of oxygen are required to produce 2.33 moles of water? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6O₂(g)→ 3CO₂(g)+ SO₂(g)+ 4H₂O (g)

A)1.55 moles O₂
B)3.50 moles O₂
C)2.33 moles O₂
D)4.14 moles O₂
E)6.21 moles O₂

Question 67

What element is undergoing oxidation (if any)in the following reaction? Zn(s)+ 2AgNO₃(aq)→ Zn(NO₃)₂(aq)+ 2Ag(s)

A)Zn
B)N
C)O
D)Ag
E)This is not an oxidation-reduction reaction.

Question 68

According to the following balanced reaction,how many moles of NO are formed from 8.44 moles of NO₂ if there is plenty of water present? 3NO₂(g)+ H₂O(l)→ 2HNO₃(aq)+ NO(g)

A)2.81 moles NO
B)25.3 moles NO
C)8.44 moles NO
D)5.63 moles NO
E)1.83 moles NO

Question 69

Determine the oxidation state of C in CO₃^2-.

A)+4
B)+2
C)-2
D)-4
E)+6

Question 70

What element is undergoing reduction (if any)in the following reaction? Zn(s)+ 2AgNO₃(aq)→ Zn(NO₃)₂(aq)+ 2Ag(s)

A)Zn
B)N
C)O
D)Ag
E)This is not an oxidation-reduction reaction.

Question 71

Determine the oxidation state of Sn in Sn(SO₄)₂.

A)+2
B)+4
C)+6
D)0
E)-2

Question 72

What element is undergoing oxidation (if any)in the following reaction? CH₄(g)+ 2O₂(g)→ CO₂(g)+ 2H₂O(g)

A)O
B)H
C)C
D)both C and H
E)This is not an oxidation-reduction reaction.

Question 73

Identify the oxidation state of H in H₂(g). Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)

A)+1
B)+2
C)0
D)-1
E)-2

Question 74

According to the following balanced reaction,how many moles of HNO₃ are formed from 8.44 moles of NO₂ if there is plenty of water present? 3NO₂(g)+ H₂O(l)→ 2HNO₃(aq)+ NO(g)

A)2.81 moles HNO₃
B)25.3 moles HNO₃
C)8.44 moles HNO₃
D)5.63 moles HNO₃
E)1.83 moles HNO₃

Question 75

Identify the oxidation state of Mg in MgCl₂(aq). Mg(s)+ 2HCl(aq)→ MgCl₂(aq)+ H₂(g)

A)+1
B)+2
C)0
D)-1
E)-2

Question 76

Which of the following is a gas-evolution reaction?

A)2C₂H₆(l)+ 7O₂(g)→ 4CO₂(g)+ 6H₂O(g)
B)2H₂(g)+ O₂(g)→ 2H₂O(g)
C)LiCl(aq)+ NaNO₃(aq)→ LiNO₃(aq)+ NaCl(aq)
D)NH₄Cl(aq)+ KOH(aq)→ KCl(aq)+ NH₃(g)+ H₂O(l)
E)None of the above is a gas-evolution reaction.

Question 77

Determine the oxidation state of S in MgSO₄.

A)-4
B)+2
C)+4
D)+6
E)-2

Question 78

Identify the net ionic equation for the reaction (if any)that occurs when aqueous solutions of Al(C₂H₃O₂)₃ and LiNO₃ are mixed.

A)Al³⁺(aq)+ 3NO₃^-(aq)→ Al(NO₃)₃(s)
B)Li⁺(aq)+ C₂H₃O₂^-(aq)→ LiC₂H₃O₂(s)
C)Al³⁺(aq)+ 3NO₃^-(aq)+ Li⁺(aq)+ C₂H₃O₂^-(aq)→ Al(NO₃)₃(aq)+ LiC₂H₃O₂(s)
D)3Li⁺(aq)+ (C₂H₃O₂)₃^3-(aq)→ Li₃(C₂H₃O₂)₃(s)
E)No reaction occurs.

Question 79

Choose the reaction that represents the combustion of C₆H₁₂O₂.

A)C₆H₁₂O₂(l)+ 8O₂(g)→ 6CO₂(g)+ 6H₂O(g)
B)Mg(s)+ C₆H₁₂O₂(l)→ MgC₆H₁₂O₂(aq)
C)6C(s)+ 6H₂(g)+ O₂(g)→ C₆H₁₂O₂(l)
D)C₆H₁₂O₂(l) → 6C(s)+ 6H₂(g)+ O₂(g)
E)None of the above represents the combustion of C₆H₁₂O₂.

Question 80

Determine the reducing agent in the following reaction. 2Li(s)+ Fe(C₂H₃O₂)₂(aq)→ 2LiC₂H₃O₂(aq)+ Fe(s)

A)O
B)H
C)C
D)Fe
E)Li