HAJ B). what are the units of the rate constant where tine is Which of the follo
ID: 495396 • Letter: H
Question
HAJ B). what are the units of the rate constant where tine is Which of the following expressions doesnos represent proper decreases from 104 Mto 0.62 M in 375 seconds. 599 10 16 is water c At equilitrium the solat MAg uaq What is e equilibrium constant for the reaction belowt 8.4 it i found that the partial For the equilibrium a 2NOxgh, a 298 K.K -0.15. Forthi tuation system. pressure of Nzow is 3.7 x 10' atmat equilibrium What is de partial pressure of NO2 at equilibrium? 0.0016 atm b, 24 am a 49 atmExplanation / Answer
13. A + 2B ---> C,
units of the rate constant
Delta C/Delta t = K [A]2[B]
Moles-2 sec-1 = 1/ M^2.s
Option b. is correct.
14. option a. is not the correct expression for the rate of reaction. There is no consideration of
reaction quotients.
a. is the answer
15. for the first order decomposition of N2O5 at high temperature, determine the rate constant if the N2O3 concentration decreases from 1.04 M to 0.62 M in 375 seconds
ln N/No = -kt
N = final amount
No = original amount
ln 0.62/l.04 = -k(375 sec)
-0.52 = -k(375)
-k = -0.52/375
k = l.38 x l0^-3 s -1
answer : d;
16. Excess Ag2So4 is placedin water at 25 oC. At equilibrium, the solution containing 0.029 M Ag+ (aq).
What is the equilibrium constant for the reaction below?
Ag2So4 (s) = 2 Ag (aq) + SO4 2- (aq)
For every moles of Ag2SO4 that dissolves, 2 moles of Ag+ and 1 mole of SO4-2 ions are formed.
K = [Ag+]^2 [SO4-2]
K= (0.029 M)^2 (0.029 M / 2)
K= 1.2 x 10^-5
Option C is correct.
17. For the equilibrium N2O4 (g) == 2NO2 (g), at 298 K, Kp = 0.15. For this reaction system, it is found that the partial pressure of N2O4 is 3.7 x 10-2 atm at equilibrium. What is the partial pressure of NO2 at equilibrium
K = [P(NO2)]^2/[P(N2O4)]
0.15 = [P(NO2)]^2/ 3.7 x 10-2
[P(NO2)]^2 = 0.555 x 10-2
P(NO2) = 0.0745 atm
Option e. is correct.
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