The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

A) 2.2 × 10-7 atm B) 4.7 × 10-4 atm C) 2.1 × 103 atm D) 4.4 × 106 atm A) 2.2 × 10-7 atm B) 4.7 × 10-4 atm C) 2.1 × 103 atm D) 4.4 × 106 atm

The reaction below virtually goes to completion because cyanide ion forms very stable complexes with Ni2+ ion: [Ni(H2O)6]2+(aq)+ 4 CN-(aq)→ [Ni(CN)4]2-(aq)+ 6 H2O(l) At the same time,incorporation of 14C labelled cyanide ion (14CN-)is very rapid: [Ni(CN)4]2-(aq)+ 4 14CN-(aq)= [Ni(14CN)4]2-(aq)+ 4 CN-(aq) Which statement below is correct with regard to stability and rate of reaction?

A) Equilibrium is static. B) Stable species can react rapidly. C) Stable species do not react rapidly. D) Unstable species react rapidly. A) Equilibrium is static. B) Stable species can react rapidly. C) Stable species do not react rapidly. D) Unstable species react rapidly.

If Kc = 7.04 × 10-2 for the reaction: 2 HBr(g)⇌ H2(g)+ Br2(g),what is the value of Kc for the reaction: ?

A) 3.52 × 10-2 B) 0.265 C) 3.77 D) 28.4 A) 3.52 × 10-2 B) 0.265 C) 3.77 D) 28.4

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.40 atm and H2 is 0.15 atm?

A) 9.0 × 10-7 atm B) 9.5 × 10-4 atm C) 1.1 × 103 atm D) 1.1 × 106 atm A) 9.0 × 10-7 atm B) 9.5 × 10-4 atm C) 1.1 × 103 atm D) 1.1 × 106 atm

For the reaction: N2(g)+ 2 O2(g)⇌ 2 NO2(g),Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?

A) 2.1 × 10-10 M B) 4.2 × 10-10 M C) 2.4 × 109 M D) 4.8 × 109 M A) 2.1 × 10-10 M B) 4.2 × 10-10 M C) 2.4 × 109 M D) 4.8 × 109 M

The decomposition of ammonia is: 2 NH3(g)⇌ N2(g)+ 3 H2(g).If the pressure of ammonia is 1.0 × 10-3 atm,and the pressures of N2 and H2 are each 0.20 atm,what is the value for Kp' at 400°C for the reverse reaction?

A) -6.2 × 10-4 B) -1.6 × 103 C) 6.2 × 10-4 D) 1.6 × 103 A) -6.2 × 10-4 B) -1.6 × 103 C) 6.2 × 10-4 D) 1.6 × 103

The pink and blue species below form a violet colored mixture at equilibrium: [Co(H2O)6]2+ (aq)+ 4 Cl- (aq)⇌ [CoCl4]2- (aq)+ 6 H2O (l) (pink)(blue) If the concentration of [Co(H2O)6]2+ is increased,what happens to the solution?

A) The concentration of [CoCl4]2- increases. B) The concentration of [CoCl4]2- decreases. C) The solution becomes colorless. D) No color change is observed. A) The concentration of [CoCl4]2- increases. B) The concentration of [CoCl4]2- decreases. C) The solution becomes colorless. D) No color change is observed.

Kp is related to Kc by the equation Kp = Kc (RT)n.What is the value of n for the reaction below? NH4NO3(s)⇌ N2O(g)+ 2 H2O(g)

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

Exam 14: Chemical Equilibrium

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

(Multiple Choice)

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Question 81

If K_c = 0.600,and K_p = 359 for a hypothetical reaction,which of the equations below could represent the reaction at 25°C?

(Multiple Choice)

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Question 82

The following two isomers of C₃H₇NO exist in equilibrium with each other in solution: If K_c = 0.57 at 25°C and the initial concentration of the reactant is 0.50 M and the product is 0.70 M,what are the concentrations at equilibrium?

(Multiple Choice)

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Question 83

The reaction below virtually goes to completion because cyanide ion forms very stable complexes with Ni²⁺ ion: [Ni(H₂O)₆]²⁺(aq)+ 4 CN^-(aq)→ [Ni(CN)₄]^2-(aq)+ 6 H₂O(l) At the same time,incorporation of ¹⁴C labelled cyanide ion (¹⁴CN^-)is very rapid: [Ni(CN)₄]^2-(aq)+ 4 ¹⁴CN^-(aq)= [Ni(¹⁴CN)₄]^2-(aq)+ 4 CN^-(aq) Which statement below is correct with regard to stability and rate of reaction?

(Multiple Choice)

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Question 84

The reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)is endothermic 298 K.The effect of adding CaO to the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaO once equilibrium is reestablished.

(Short Answer)

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Question 85

The hexaammine cobalt(III)ion is very unstable in acidic aqueous solution: [Co(NH₃)₆]³⁺(aq)+ 6 H₃O⁺(aq)→ [Co(H₂O)₆]⁴⁺(aq)+ 6 NH₄⁺(aq) However,solutions of hexaammine cobalt(III)can be stored in acidic solution for months without noticeable decomposition.Which statement below about the equilibrium constant and the activation energy for the reaction is true?

(Multiple Choice)

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Question 86

If K_c = 7.04 × 10^-2 for the reaction: 2 HBr(g)⇌ H₂(g)+ Br₂(g),what is the value of K_c for the reaction: ?

(Multiple Choice)

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Question 87

Consider the interconversion of A molecules (shaded spheres)and B molecules (unshaded spheres)according to the reaction A ⇌ B.Each of the following series of pictures represents a separate experiment in which time increases from left to right. -What is the value of the equilibrium constant K_c for the reaction A ⇌ B?

(Multiple Choice)

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Question 88

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.40 atm and H₂ is 0.15 atm?

(Multiple Choice)

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Question 89

For the reaction: N₂(g)+ 2 O₂(g)⇌ 2 NO₂(g),K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

(Multiple Choice)

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Question 90

The decomposition of ammonia is: 2 NH₃(g)⇌ N₂(g)+ 3 H₂(g).If the pressure of ammonia is 1.0 × 10^-3 atm,and the pressures of N₂ and H₂ are each 0.20 atm,what is the value for K_p' at 400°C for the reverse reaction?

(Multiple Choice)

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Question 91

The pink and blue species below form a violet colored mixture at equilibrium: [Co(H₂O)₆]²⁺ (aq)+ 4 Cl^- (aq)⇌ [CoCl₄]^2- (aq)+ 6 H₂O (l) (pink)(blue) If the concentration of [Co(H₂O)₆]²⁺ is increased,what happens to the solution?

(Multiple Choice)

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Question 92

At 298 K,K_p = 2.1 × 10⁴ for the reaction CO(g)+ 2 H₂(g)⇌ CH₃OH(g).What is the value of K_c at this temperature?

(Short Answer)

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Question 93

For the reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)the equilibrium expression is K_p = ________.

(Short Answer)

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Question 94

What effect will a change in temperature have on the value of K_p?

(Multiple Choice)

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Question 95

A catalyst increases the overall rate of reaction by lowering the activation energy,E_a,for

(Multiple Choice)

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Question 96

As a rule,which of the following phases are not included in the equilibrium constant expression? I.pure liquids II.pure solids III.aqueous solutions IV.gases

(Multiple Choice)

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Question 97

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

(Multiple Choice)

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Question 98

K_p is related to K_c by the equation K_p = K_c (RT)ⁿ.What is the value of n for the reaction below? NH₄NO₃(s)⇌ N₂O(g)+ 2 H₂O(g)

(Multiple Choice)

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Question 99

For which one of the following reactions will K_c = K_p?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 171

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

If K_c = 0.600,and K_p = 359 for a hypothetical reaction,which of the equations below could represent the reaction at 25°C?

The following two isomers of C₃H₇NO exist in equilibrium with each other in solution: If K_c = 0.57 at 25°C and the initial concentration of the reactant is 0.50 M and the product is 0.70 M,what are the concentrations at equilibrium?

The reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)is endothermic 298 K.The effect of adding CaO to the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaO once equilibrium is reestablished.

If K_c = 7.04 × 10^-2 for the reaction: 2 HBr(g)⇌ H₂(g)+ Br₂(g),what is the value of K_c for the reaction: ?

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.40 atm and H₂ is 0.15 atm?

For the reaction: N₂(g)+ 2 O₂(g)⇌ 2 NO₂(g),K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

The decomposition of ammonia is: 2 NH₃(g)⇌ N₂(g)+ 3 H₂(g).If the pressure of ammonia is 1.0 × 10^-3 atm,and the pressures of N₂ and H₂ are each 0.20 atm,what is the value for K_p' at 400°C for the reverse reaction?

The pink and blue species below form a violet colored mixture at equilibrium: [Co(H₂O)₆]²⁺ (aq)+ 4 Cl^- (aq)⇌ [CoCl₄]^2- (aq)+ 6 H₂O (l) (pink)(blue) If the concentration of [Co(H₂O)₆]²⁺ is increased,what happens to the solution?

At 298 K,K_p = 2.1 × 10⁴ for the reaction CO(g)+ 2 H₂(g)⇌ CH₃OH(g).What is the value of K_c at this temperature?

For the reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)the equilibrium expression is K_p = ________.

What effect will a change in temperature have on the value of K_p?

A catalyst increases the overall rate of reaction by lowering the activation energy,E_a,for

As a rule,which of the following phases are not included in the equilibrium constant expression? I.pure liquids II.pure solids III.aqueous solutions IV.gases

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

K_p is related to K_c by the equation K_p = K_c (RT)ⁿ.What is the value of n for the reaction below? NH₄NO₃(s)⇌ N₂O(g)+ 2 H₂O(g)

For which one of the following reactions will K_c = K_p?

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Exam 14: Chemical Equilibrium

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.10 atm and H2 is 0.15 atm?

If Kc = 0.600,and Kp = 359 for a hypothetical reaction,which of the equations below could represent the reaction at 25°C?

The following two isomers of C3H7NO exist in equilibrium with each other in solution: If Kc = 0.57 at 25°C and the initial concentration of the reactant is 0.50 M and the product is 0.70 M,what are the concentrations at equilibrium?

The reaction CaCO3(s)⇌ CaO(s)+ O2(g)is endothermic 298 K.The effect of adding CaO to the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaO once equilibrium is reestablished.

If Kc = 7.04 × 10-2 for the reaction: 2 HBr(g)⇌ H2(g)+ Br2(g),what is the value of Kc for the reaction: ?

The decomposition of ammonia is: 2 NH3(g)= N2(g)+ 3 H2(g).If Kp is 1.5 × 103 at 400°C,what is the partial pressure of ammonia at equilibrium when N2 is 0.40 atm and H2 is 0.15 atm?

For the reaction: N2(g)+ 2 O2(g)⇌ 2 NO2(g),Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?

The decomposition of ammonia is: 2 NH3(g)⇌ N2(g)+ 3 H2(g).If the pressure of ammonia is 1.0 × 10-3 atm,and the pressures of N2 and H2 are each 0.20 atm,what is the value for Kp' at 400°C for the reverse reaction?

The pink and blue species below form a violet colored mixture at equilibrium: [Co(H2O)6]2+ (aq)+ 4 Cl- (aq)⇌ [CoCl4]2- (aq)+ 6 H2O (l) (pink)(blue) If the concentration of [Co(H2O)6]2+ is increased,what happens to the solution?

At 298 K,Kp = 2.1 × 104 for the reaction CO(g)+ 2 H2(g)⇌ CH3OH(g).What is the value of Kc at this temperature?

For the reaction CaCO3(s)⇌ CaO(s)+ O2(g)the equilibrium expression is Kp = ________.

What effect will a change in temperature have on the value of Kp?

A catalyst increases the overall rate of reaction by lowering the activation energy,Ea,for

As a rule,which of the following phases are not included in the equilibrium constant expression? I.pure liquids II.pure solids III.aqueous solutions IV.gases

The following picture represents the equilibrium state for the reaction A2 + B2 ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,kf,and the rate constant for the reverse reaction kr?

Kp is related to Kc by the equation Kp = Kc (RT)n.What is the value of n for the reaction below? NH4NO3(s)⇌ N2O(g)+ 2 H2O(g)

For which one of the following reactions will Kc = Kp?

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The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.10 atm and H₂ is 0.15 atm?

If K_c = 0.600,and K_p = 359 for a hypothetical reaction,which of the equations below could represent the reaction at 25°C?

The following two isomers of C₃H₇NO exist in equilibrium with each other in solution: If K_c = 0.57 at 25°C and the initial concentration of the reactant is 0.50 M and the product is 0.70 M,what are the concentrations at equilibrium?

The reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)is endothermic 298 K.The effect of adding CaO to the system at equilibrium will ________ (decrease,increase,have no effect on)the total quantity of CaO once equilibrium is reestablished.

If K_c = 7.04 × 10^-2 for the reaction: 2 HBr(g)⇌ H₂(g)+ Br₂(g),what is the value of K_c for the reaction: ?

The decomposition of ammonia is: 2 NH₃(g)= N₂(g)+ 3 H₂(g).If K_p is 1.5 × 10³ at 400°C,what is the partial pressure of ammonia at equilibrium when N₂ is 0.40 atm and H₂ is 0.15 atm?

For the reaction: N₂(g)+ 2 O₂(g)⇌ 2 NO₂(g),K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

The decomposition of ammonia is: 2 NH₃(g)⇌ N₂(g)+ 3 H₂(g).If the pressure of ammonia is 1.0 × 10^-3 atm,and the pressures of N₂ and H₂ are each 0.20 atm,what is the value for K_p' at 400°C for the reverse reaction?

The pink and blue species below form a violet colored mixture at equilibrium: [Co(H₂O)₆]²⁺ (aq)+ 4 Cl^- (aq)⇌ [CoCl₄]^2- (aq)+ 6 H₂O (l) (pink)(blue) If the concentration of [Co(H₂O)₆]²⁺ is increased,what happens to the solution?

At 298 K,K_p = 2.1 × 10⁴ for the reaction CO(g)+ 2 H₂(g)⇌ CH₃OH(g).What is the value of K_c at this temperature?

For the reaction CaCO₃(s)⇌ CaO(s)+ O₂(g)the equilibrium expression is K_p = ________.

What effect will a change in temperature have on the value of K_p?

A catalyst increases the overall rate of reaction by lowering the activation energy,E_a,for

The following picture represents the equilibrium state for the reaction A₂ + B₂ ⇌ 2AB.What is the relationship between the rate constant for the forward reaction,k_f,and the rate constant for the reverse reaction k_r?

K_p is related to K_c by the equation K_p = K_c (RT)ⁿ.What is the value of n for the reaction below? NH₄NO₃(s)⇌ N₂O(g)+ 2 H₂O(g)

For which one of the following reactions will K_c = K_p?