31 , For the reaction of hydrogen and nitrogen gases at 30°C to form two moles o

Question

31 , For the reaction of hydrogen and nitrogen gases at 30°C to form two moles of ammonia gas (NII), the value ofK, is 4.5 × 10-12. What is the value of Ke for the same reaction? a, 2.8 x 10" b. 1.6x10" c. 5.2 x 104 d. 3.1x 10'to e. 3.3 × 1011 (K, 6. What is 0.277 Ai a. 4.6 b. 1.0× --32. Given the following data for the reaction A B, determine the frequency factor, A, of the d. 2.2× e none & (M/s) 0.282 0.291 TOC) 277 627 container with initin respective a. +0.304 b. +1.31 d. +0.270 e -0.500 correct? a. Some b. Some l c The sy- -33. Ifthe reaction 3A + B +jc2D + E is second order overall, which of these could be the units of its rate constant, k? d. The fin this qu None o b. Ms c. M's e. Questions -34. In first order reaction, the initial concentration of A is 0.40 M. What is the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds? An excess solution tha allowed to are then fl and solid i d. e. 1.3 x 10 2.5×10-1 M M a. 8.0×10-2 M b. 2.0 M c. 5.0 x 10M 35. Calculate the solubility of Cu(OH)z in a solution buffered at pH -7.59.(K-1.6x 10-) a. 3.9 × 10-5 M b. 4.1 x 10-M c. 1.1×10-6 M d. 1.5x10"3M e. none of these 39. W 25°C? The apply Fe(ag) t Cu (ay) 36. A solution of 8.01 M formic acid (HCOOH) is 0.47% ionized. What is the K, value of formic acid? A) 1 B) 0 C) 2.5 x D) 4.4 x E) none electrod b. 1.8 x 10- B) -0 DO

Explanation / Answer

Ans 31

Balanced equation between nitrogen and hydrogen

N2 + 3H2 = 2NH3

Temperature T = 30+273 = 303 K

Net Change in moles n = 2 - (1+3) = - 2

Kp = 4.5*10^-12 = Kc x (RT)^n

Kc = (4.5*10^-12)/(0.08206*303)^-2

= 2.8 x 10^-9

Option A is the correct answer

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