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12. Which set of units of A: the rate constant of first-order reactions, B: the rate...
d. MS : Ms 13. The decay of 2M Seaborgium-266 (26Sg) takes 60 seconds to become a 4 of its original amount. What is...
d. MS : Ms 13. The decay of 2M Seaborgium-266 (26Sg) takes 60 seconds to become a 4 of its original amount. What is the rate constant of this isotope? a. 0.006 b. 0.012 c. 0.023
0, 0.012 c. 0.023 d. 21.6 14. Determine the velocity of the elementary reaction 2X →...
0, 0.012 c. 0.023 d. 21.6 14. Determine the velocity of the elementary reaction 2X → P, when the sample contains 5 M X and the rate constant for the reaction is 3.0. a. 0.6 b. 7.5 c. 15 d. 75 15. In the Question 14. how much time is required for the half of the X to be used for the reaction? a. 0.013 sec b. 0.067 sec c. 0.6 sec d. 1.67 sec 16. Which of the following...
The following questions pertain to radioactive decay, which are first-order reactions. • Decay constant = rate...
The following questions pertain to radioactive decay, which are first-order reactions. • Decay constant = rate constant • Activity is the number of nuclei (N) decaying per unit time 1. a. What is the decay constant for the B emission of 3H given ty = 12.26 yr? b. What fraction of tritium atoms in a sample remains after 100.0 yr? c. If the original number of tritium atoms was 1.50 x 1018, what is the number remaining? and that a....
A certain first-order reaction (A products) has a rate constant of 5.40 10-3 s I at...
A certain first-order reaction (A products) has a rate constant of 5.40 10-3 s I at 45 °C How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? at 27 °C A certain second-order reaction (B-products) has a rate constant of 1.05x10-3 M 1.s and an initial half-life of 266 s What is the concentration of the reactant B after one half-life?
At a given temperature, the elementary reaction A --->B in the forward direction is first order...
At a given temperature, the elementary reaction A --->B in the forward direction is first order in A with a rate constant of 1.60*10^2 s^-1. The reverse reaction is first order in B and the rate constant is 9.30*10^-2 s^-1 What is the value of the equilibrium constant for the reaction A --->B at this temperature? What is the value of equilibrium constant for the reaction B-->A at this temperature? (and all reactions are in equilibrium of course i just...
Question 6 (18 marks) (a) Given that the rate constant k for the first-order decomposition of...
Question 6 (18 marks) (a) Given that the rate constant k for the first-order decomposition of compound X is 2.65 x 10-9 s', calculate the percentage of compound X that has decomposed in the first 2250 seconds after the reaction begins. (4 marks) (b) Consider the first order reaction: W2 → 2 Y. If [W2]=0.8 M initially and 0.17 M after 160 seconds, what will [W2] be after 350 seconds? (4 marks) (c) Data for the reaction 3A + 5B...
13.49. Write rate laws and determine the units of the rate constant (using the units M...
13.49. Write rate laws and determine the units of the rate constant (using the units M for concentration and s for time) for the following reactions: a. The reaction of oxygen atoms with NO, is first order in both reactants. b. The reaction between NO and Cl, is second order in NO and first order in Cl. c. The reaction between Cl2 and chloroform (CHC1z) is first order in CHCl3 and one-half order in C1. *d. The decomposition of ozone...
OCTIN QUESTION 4 The first order reactions A → B (rate constant ke) and A →...
OCTIN QUESTION 4 The first order reactions A → B (rate constant ke) and A → 2C (rate constant ke) oc liquid phase plug flow reactor 4 1 What is the expression for rn? 4 2 Show that the change in concentration of A wath residence tirne τ is described by 4 3 Show that the change in concentration of B with residence time is descnibed by 44 Derive an expression for the mole fraction of C in the exit...
Show that the reaction A - B + C, which is first-order forward (rate constant k)...
Show that the reaction A - B + C, which is first-order forward (rate constant k) and second-order reverse (rate constant k), relaxes exponentially for small displacements from equilibrium. Find an expression for the relaxation time in terms of k, and k. (Hint: Let x be a small displacement from equilibrium. For such a displacement, xº is negligible.)
1. A reaction is second order in[A] and second-order in [B]: Rate,=K[A]^2[B]^2. what are the units...
1. A reaction is second order in[A] and second-order in [B]: Rate,=K[A]^2[B]^2. what are the units of k for this reaction? If the concentration of air decreases by a factor of 2 and the concentration of b increases by a factor of 5 what happens to the rate? 2. for the forward reaction 2NO+Cl2=>2NOCl. determine the rate(m/s)for experiment #4 given [NO]°(M)=0.40M and [Cl2]°z(M)=0?20M. Rate? 3.The following data were collected over time for the forward reaction 2NO2=>2NO+O2 ( 1/[NO2]=100 at 0...
d. MS : Ms 13. The decay of 2M Seaborgium-266 (26Sg) takes 60 seconds to become a 4 of its original amount. What is the rate constant of this isotope? a. 0.006 b. 0.012 c. 0.023
0, 0.012 c. 0.023 d. 21.6 14. Determine the velocity of the elementary reaction 2X → P, when the sample contains 5 M X and the rate constant for the reaction is 3.0. a. 0.6 b. 7.5 c. 15 d. 75 15. In the Question 14. how much time is required for the half of the X to be used for the reaction? a. 0.013 sec b. 0.067 sec c. 0.6 sec d. 1.67 sec 16. Which of the following...
The following questions pertain to radioactive decay, which are first-order reactions. • Decay constant = rate constant • Activity is the number of nuclei (N) decaying per unit time 1. a. What is the decay constant for the B emission of 3H given ty = 12.26 yr? b. What fraction of tritium atoms in a sample remains after 100.0 yr? c. If the original number of tritium atoms was 1.50 x 1018, what is the number remaining? and that a....
A certain first-order reaction (A products) has a rate constant of 5.40 10-3 s I at 45 °C How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration? at 27 °C A certain second-order reaction (B-products) has a rate constant of 1.05x10-3 M 1.s and an initial half-life of 266 s What is the concentration of the reactant B after one half-life?
Question 6 (18 marks) (a) Given that the rate constant k for the first-order decomposition of compound X is 2.65 x 10-9 s', calculate the percentage of compound X that has decomposed in the first 2250 seconds after the reaction begins. (4 marks) (b) Consider the first order reaction: W2 → 2 Y. If [W2]=0.8 M initially and 0.17 M after 160 seconds, what will [W2] be after 350 seconds? (4 marks) (c) Data for the reaction 3A + 5B...
13.49. Write rate laws and determine the units of the rate constant (using the units M for concentration and s for time) for the following reactions: a. The reaction of oxygen atoms with NO, is first order in both reactants. b. The reaction between NO and Cl, is second order in NO and first order in Cl. c. The reaction between Cl2 and chloroform (CHC1z) is first order in CHCl3 and one-half order in C1. *d. The decomposition of ozone...
OCTIN QUESTION 4 The first order reactions A → B (rate constant ke) and A → 2C (rate constant ke) oc liquid phase plug flow reactor 4 1 What is the expression for rn? 4 2 Show that the change in concentration of A wath residence tirne τ is described by 4 3 Show that the change in concentration of B with residence time is descnibed by 44 Derive an expression for the mole fraction of C in the exit...
Show that the reaction A - B + C, which is first-order forward (rate constant k) and second-order reverse (rate constant k), relaxes exponentially for small displacements from equilibrium. Find an expression for the relaxation time in terms of k, and k. (Hint: Let x be a small displacement from equilibrium. For such a displacement, xº is negligible.)
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