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Aqueous AB, decomposes according to the first order reaction:AB2(aq)⟶A(g)+2B(l)After 20 min the volume of A(g) collected during such a reaction is 20 mL, and that collected after a very long time is 40 mL. The rate constant is:

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a

3.45×10−3min-1

b

3.45×10−2min−1

c

1.435×10−2min−1

d

6.93 min−1

answer is B.

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Detailed Solution

AB2aq→first order Ag + 2B(l) t = 0 a 0 0 t = 20 min (a-x) x 2x t=∞ 0 a 2a

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Aqueous AB, decomposes according to the first order reaction:AB2(aq)⟶A(g)+2B(l)After 20 min the volume of A(g) collected during such a reaction is 20 mL, and that collected after a very long time is 40 mL. The rate constant is: