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20. Which of the following does not play a part in determining the rate of a...
.Il Vodafone - Stay Home Question 3 of 33 Submit All of the following are factors...
.Il Vodafone - Stay Home Question 3 of 33 Submit All of the following are factors that affect the rate of a reaction except A) the concentration of the reactants. B) presence of a catalyst. C) the magnitude of the equilibrium constant. D) the temperature of the reaction. E) the surface area of the solid reactants.
Which statement below is true only for a homogeneous catalysts? a. A homogeneous catalyst increase the...
Which statement below is true only for a homogeneous catalysts? a. A homogeneous catalyst increase the rate of reaction by providing an alternative pathway with a lower activation energy. b. A homogeneous catalyst is a solid substance to which liquid or gaseous reactants will adhere to the surface of the catalyst. c. A homogeneous catalyst is when the catalyst is in the same physical state as the reactant. d. A homogeneous catalyst will eventually be consumed in a chemical reaction.
1. Some solids can be converted directly to the vapor phase by heating. The process is...
1. Some solids can be converted directly to the vapor phase by heating. The process is called: a) Fusion b) sublimation c) vaporization d) condensation e) distillation 2. Which one of the following substances is INCORRECTLY matched with the kind of solid it forms? Substance Kind of Solid a) Sulfur dioxide molecular b) Graphite covalent c) Calcium bromide ionic d) Lithium ionic e) Methane molecular 3. Arrange the following in order of increasing melting points: KCl, He, H2O, HF. a)...
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant...
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant concentration C) A catalyst D) Temperature, reactant concentration, and a catalyst 13.) A fast reaction rate for a chemical reaction is dependent on: A) having a large activation energy B) having a small activation energy C) being exothermic D) being endothermic 14.)) A catalyst is A) a substance that decreases the energy of the products. B) a product in a chemical reaction. c) a...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before" and after they are bumped. We expect the stack of marbles (less random, lower entropy) to be the...
Which of the following business factors does not play a role in determining a company's credit...
Which of the following business factors does not play a role in determining a company's credit rating? Select one: A. Industry characteristics B. Capital structure C. Management D. Profitability E. None of the above
30 For which of the following Keg values does the equilibrium lie to the right? a)...
30 For which of the following Keg values does the equilibrium lie to the right? a) Keq = 1 x 10-14 b) Keq = 1 x 10-4 c) Keq = 1 x 105 d) Keg = 1 x 1015 e) no correct response 32 According to collision theory, which of the following factors influences the rate of a reaction? Choose all that apply. a) the molar mass of the reactants b) the pH of the reactants c) the physical state...
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction....
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction. This is shown as the blue path with Ea in the diagram below t a given temperature, a catalyst increases the rate of a reaction by providing a pathway E (RJ) products Reaction Coordinale Since the potential energy barrier is lower in the presence of a catalyst, a greater fraction of the molecules will have sufficient energy to react. Because the reactants and products...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of a reaction at 60 °C will greater than at 30°C because – A) the higher temperature leads to greater surface area on solid or liquid reactants. B) the reactants at 60°C will be moving with too great of a speed to collide effectively. C) the activation energy will be lower at 60°C. D) there is a greater proportion of reactants with the necessary kinetic...
Describe the Preparation of Colloidal Systems Question Which of the following are emulsifying age...
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Describe the Preparation of Colloidal Systems Question Which of the following are emulsifying agents in the given context? (select all that apply) Select all that apply: Water in an oil-vinegar salad dressing Soap in a mixture of water and oil The milk in buttermilk The egg yolk components in mayonnaise FEEDBACK MORE INSTRUCTION SUBMIT Describe the Properties of Solutions of Solids in Liquids Question Which of the following are likely to have a significant effect on the...
.Il Vodafone - Stay Home Question 3 of 33 Submit All of the following are factors that affect the rate of a reaction except A) the concentration of the reactants. B) presence of a catalyst. C) the magnitude of the equilibrium constant. D) the temperature of the reaction. E) the surface area of the solid reactants.
1. Some solids can be converted directly to the vapor phase by heating. The process is called: a) Fusion b) sublimation c) vaporization d) condensation e) distillation 2. Which one of the following substances is INCORRECTLY matched with the kind of solid it forms? Substance Kind of Solid a) Sulfur dioxide molecular b) Graphite covalent c) Calcium bromide ionic d) Lithium ionic e) Methane molecular 3. Arrange the following in order of increasing melting points: KCl, He, H2O, HF. a)...
12.) Which of the following factors influence the rate of a reaction? A) Temperature B) Reactant concentration C) A catalyst D) Temperature, reactant concentration, and a catalyst 13.) A fast reaction rate for a chemical reaction is dependent on: A) having a large activation energy B) having a small activation energy C) being exothermic D) being endothermic 14.)) A catalyst is A) a substance that decreases the energy of the products. B) a product in a chemical reaction. c) a...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before" and after they are bumped. We expect the stack of marbles (less random, lower entropy) to be the...
30 For which of the following Keg values does the equilibrium lie to the right? a) Keq = 1 x 10-14 b) Keq = 1 x 10-4 c) Keq = 1 x 105 d) Keg = 1 x 1015 e) no correct response 32 According to collision theory, which of the following factors influences the rate of a reaction? Choose all that apply. a) the molar mass of the reactants b) the pH of the reactants c) the physical state...
Effect of a Catalyst on Reaction Rate: with a lower Ea than for the uncatalyzed reaction. This is shown as the blue path with Ea in the diagram below t a given temperature, a catalyst increases the rate of a reaction by providing a pathway E (RJ) products Reaction Coordinale Since the potential energy barrier is lower in the presence of a catalyst, a greater fraction of the molecules will have sufficient energy to react. Because the reactants and products...
Il Vodafone - Stay Home 8:51 PM Question 1 of 33 Submit The reaction rate of a reaction at 60 °C will greater than at 30°C because – A) the higher temperature leads to greater surface area on solid or liquid reactants. B) the reactants at 60°C will be moving with too great of a speed to collide effectively. C) the activation energy will be lower at 60°C. D) there is a greater proportion of reactants with the necessary kinetic...
1.
2.
3.
Describe the Preparation of Colloidal Systems Question Which of the following are emulsifying agents in the given context? (select all that apply) Select all that apply: Water in an oil-vinegar salad dressing Soap in a mixture of water and oil The milk in buttermilk The egg yolk components in mayonnaise FEEDBACK MORE INSTRUCTION SUBMIT Describe the Properties of Solutions of Solids in Liquids Question Which of the following are likely to have a significant effect on the...
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