48. For a certain reaction, the mechanism has been proposed. A(g) + B(g) X(g) [f

Question

48. For a certain reaction, the mechanism has been proposed. A(g) + B(g) X(g) [fast] X(g) + C(g) right arrow Y(g) [slow] Y(g) right arrow D(g) [fast] Which statement is correct? (A) Only one intermediate is involved in the mechanism. (B) The third step In the mechanism is rate-determining. (C) The overall reaction is A(g) + B(g) + X(g) right arrow D(g) (D) The first step in the mechanism is bimolecular. 49. If nitrogen gas were added to this system at equilibrium, how does the concentration of hydrogen gas change as equilibrium is reestablished? N2(g) + 3H2(g) 2NH3(g) K = 1.64 X10^4 at 400 degree C (A) decreases (B) stay the same (C) increases (D) impossible to predict with the given information

Explanation / Answer

48: the first step is bimolecular

49. decreases

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