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16 April, 06:03

Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of : () () () Suppose a ⁢ flask is charged under these conditions with of ammonia. How much is left later? You may assume no other reaction is important. Be sure your answer has a unit symbol, if necessary, and round it to significant digits.

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  1. 16 April, 06:14
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    26.6 s.

    Explanation:

    For a zero order kinetics, the formula is:

    [A] = [A₀] - kt

    where,

    [A] = amount pr concentration left

    [A₀] = initial concentration or amount

    k = rate constant

    t = time

    concentration = mole/volume

    [A₀] = 0.5/2.0

    = 0.25 M

    [A] = 0.25/2.0

    = 0.125 M

    k = 0.0047 Ms⁻¹

    t = ([A] - [A₀]/-k

    = (0.125 - 0.25) / (-0.0047)

    = 26.60 s.

    the amount is reduced by half after 26.6 seconds
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