Deck 4: Chemical Reactions and Stoichiometry

Question 1

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)

Answer 1

Al(C₂H₃O₂)₃(aq)+ (NH₄)₃PO₄(aq)→ AlPO₄(s)+ 3NH₄C₂H₃O₂(aq)

Question 2

Which of the following is a weak electrolyte?

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

Answer 2

MgCO₃

Question 3

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

Answer 3

2, 2, 1, 2

Question 4

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 5

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 6

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 7

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 8

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

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

Question 9

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 10

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 11

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 12

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

A)4, 6, 4,
B)4, 6, 4, 5
C)2, 3, 2, 2
D)2, 3, 2, 3
E)4, 4, 6, 6

Question 13

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 14

Which of the following is considered a strong electrolyte?

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

Question 15

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 16

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 17

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 18

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 19

Which of the following describes NaCl?

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

Question 20

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 21

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 22

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 23

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 24

Identify the complete 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 25

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 26

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 27

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 28

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 29

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 30

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 31

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

A)NaOH
B)BaCO₃
C)Na₂CO₃
D)Ba(OH)₂

Question 32

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 33

An acid solution is 0.100 mol L^-1 in HCl and 0.200 mol L^-1 H₂SO₄. What volume of a 0.150 mol L^-1 KOH solution would completely neutralize 500.0 mL of this solution?

A)0.700 L
B)1.98 L
C)1.67 L
D)1.02 L
E)0.250 L

Question 34

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 35

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 36

Identify the polyprotic acid.

A)H₂SO₄
B)HCl
C)NaCl
D)NaOH
E)Li(OH)₂

Question 37

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 38

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 39

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 40

Which of the following is a precipitation reaction?

A)2HBr(aq)+ NiS(s)→ NiBr₂(aq)+ H₂S(g)
B)NH₄I(aq)+ NaOH(aq)→ H₂O(l)+ NH₃(g)+ NaI(aq)
C)2C₄H₆(g)+ 11O₂(g)→ 8CO₂(g)+ 6H₂O(g)
D)NO(g)+ H₂O(g)→ NH₃(g)+ O₂(g)
E)CrBr₂(aq)+ Na₂CO₃(aq)→ CrCO₃(s)+ 2NaBr(aq)

Question 41

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 42

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 43

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 44

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

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

Question 45

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 46

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

Question 47

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 48

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 49

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(g)
D)NH₄Cl(aq)+ KOH(aq)→ KCl(aq)+ NH₃(g)+ H₂O(l)
E)None of the above is a gas-evolution reaction.

Question 50

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 51

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)None of the elements is undergoing oxidation.

Question 52

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

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

Question 53

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 54

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 55

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

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

Question 56

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 57

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 58

Determine the oxidation state of S in MgSO₄.

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

Question 59

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

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

Question 60

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 61

How many molecules of HCl are formed when 50.0 g of water reacts according to the following balanced reaction? Assume excess ICl₃. 2 ICl₃ + 3H₂O → ICl + HIO₃ + 5HCl

A)2.78 × 10²⁴ molecules HCl
B)1.67 × 10²⁴ molecules HCl
C)5.02 × 10²⁵ molecules HCl
D)6.09 × 10²⁵ molecules HCl
E)3.65 × 10²⁴ molecules HCl

Question 62

Consider the following balanced reaction. How many grams of water are required to form 75.9 g of HNO₃? Assume that there is excess NO₂ present. The molar masses are as follows: H₂O = 18.02 g mol^-1, HNO₃ = 63.02 g mol^-1. 3NO₂(g)+ H₂O(l)→ 2HNO₃(aq)+ NO(g)

A)38.0 g H₂O
B)21.7 g H₂O
C)43.4 g H₂O
D)10.9 g H₂O
E)26.5 g H₂O

Question 63

According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? 2H₂S(g)+ SO₂(g)→ 3S(s)+ 2H₂O(l)

A)99.8 g S
B)66.6 g S
C)56.1 g S
D)44.4 g S
E)14.0 g S

Question 64

How many moles of nitrogen are formed when 58.6 g of KNO₃ decomposes according to the following reaction? The molar mass of KNO₃ is 101.11 g mol^-1. 4KNO₃(s)→ 2K₂O(s)+ 2N₂(g)+ 5O₂(g)

A)0.290 mol N₂
B)0.580 mol N₂
C)18.5 mol N₂
D)0.724 mol N₂
E)1.73 mol N₂

Question 65

How many moles of oxygen are formed when 58.6 g of KNO₃ decomposes according to the following reaction? The molar mass of KNO₃ is 101.11 g mol^-1. 4KNO₃(s)→ 2K₂O(s)+ 2N₂(g)+ 5O₂(g)

A)0.290 mol O₂
B)0.580 mol O₂
C)18.5 mol O₂
D)0.724 mol O₂
E)1.73 mol O₂

Question 66

Give the theoretical yield, in moles, of CO₂ from the reaction of 4.00 moles of C₈H₁₈ with 4.00 moles of O₂. 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O

A)0.640 moles
B)64.0 moles
C)2.56 moles
D)16.0 moles

Question 67

According to the following balanced reaction, how many moles of KOH will be formed from 5.44 moles of H₂O? Assume an excess of KO. 4KO(s)+ 2H₂O(l)→ 4KOH(s)+ O₂(g)

A)2.72 moles KOH
B)16.7 moles KOH
C)10.9 moles KOH
D)8.33 moles KOH
E)4.87 moles KOH

Question 68

How many grams of Li₃N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6Li(s)+ N₂(g)→ 2Li₃N(s)

A)18.3 g Li₃N
B)20.3 g Li₃N
C)58.3 g Li₃N
D)61.0 g Li₃N
E)15.1 g Li₃N

Question 69

Determine the limiting reactant (LR)and the mass (in g)of nitrogen that can be formed from 50.0 g N₂O₄ and 45.0 g N₂H₄. Some possibly useful molar masses are as follows: N₂O₄ = 92.02 g mol^-1, N₂H₄ = 32.05 g mol^-1. N₂O₄(l)+ 2N₂H₄(l)→ 3N₂(g)+ 4H₂O(g)

A)LR = N₂H₄, 59.0 g N₂ formed
B)LR = N₂O₄, 105 g N₂ formed
C)LR = N₂O₄, 45.7 g N₂ formed
D)LR = N₂H₄, 13.3 g N₂ formed
E)No LR, 45.0 g N₂ formed

Question 70

According to the following balanced reaction, how many moles of KO are required to exactly react with 5.44 moles of H₂O? 4KO(s)+ 2H₂O(l)→ 4KOH(s)+ O₂(g)

A)2.72 moles KO
B)16.7 moles KO
C)10.9 moles KO
D)8.33 moles KO
E)4.87 moles KO

Question 71

Determine the theoretical yield of H₂S (in moles)if 4.0 mol Al₂S₃ and 4.0 mol H₂O are reacted according to the following balanced reaction. A possibly useful molar mass is Al₂S₃ = 150.17 g mol^-1. Al₂S₃(s)+ 6H₂O(l)→ 2Al(OH)₃(s)+ 3H₂S(g)

A)12 mol H₂S
B)4.0 mol H₂S
C)18 mol H₂S
D)6.0 mol H₂S
E)2.0 mol H₂S

Question 72

Consider the following balanced reaction. What mass (in g)of CO₂ can be formed from 288 mg of O₂? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6O₂(g)→ 3CO₂(g)+ SO₂(g)+ 4H₂O(g)

A)0.396 g CO₂
B)0.209 g CO₂
C)0.792 g CO₂
D)0.126 g CO₂
E)0.198 g CO₂

Question 73

Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium and 42.3 g of iodine. If the second sample produced 24.4 kg of potassium, how many kilograms of iodine were produced?

A)13.3 kg
B)22.5 kg
C)79.4 kg
D)44.4 kg
E)92.4 kg

Question 74

A 14.01 g sample of N₂ reacts with 3.02 g of H₂ to form ammonia (NH₃). If ammonia is the only product, what mass of ammonia is formed?

A)17.03 g
B)1.10 g
C)14.01 g
D)3.02 g
E)23.07 g

Question 75

How many molecules of H₂S are required to form 79.0 g of sulfur according to the following reaction? Assume excess SO₂. 2H₂S(g)+ SO₂(g)→ 3S(s)+ 2H₂O(l)

A)1.48 × 10²⁴ molecules H₂S
B)9.89 × 10²³ molecules H₂S
C)5.06 × 10²⁵ molecules H₂S
D)3.17 × 10²⁵ molecules H₂S
E)2.44 × 10²³ molecules H₂S

Question 76

Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

A)4.40 g
B)8.80 g
C)2.20 g
D)6.20 g

Question 77

Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced 0.154 g of calcium and 0.146 g of fluorine. If the second sample produced 294 mg of fluorine, how many grams of calcium were formed?

A)0.280 g
B)3.09 × 10² g
C)3.13 g
D)0.309 g
E)2.80 × 10² g

Question 78

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4KO(s)+ 2H₂O(l)→ 4KOH(s)+ O₂(g)

A)19.9 g O₂
B)27.9 g O₂
C)49.7 g O₂
D)3.59 g O₂
E)11.7 g O₂

Question 79

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 80

A 12.39 g sample of phosphorus reacts with 42.54 g of chlorine to form only phosphorus trichloride (PCl₃). If it is the only product, what mass of PCl₃ is formed?

A)30.15 g
B)54.93 g
C)140.01 g
D)79.71 g
E)91.86 g