The gas-phase reaction between Br2 and H2 to form HBr is assumed to proceed by the following mechanism: Br2 3:4 2Br Br 1 H2 3:4 HBr 1 H H 1 Br2 88n HBr 1 Br 2Br 88n Br2 a. Under what conditions does the rate law have the form rate 5 k9[Br2]? b. Under what conditions does the rate law have the form rate 5 k0[H2][Br2]1/2? c. Give expressions for k9 and k0 in terms of the rate constants used to define the mechanism.

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explanation:

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the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s