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Q.

The decomposition of NH₃on platinum surface is zero order reaction. If rate constant (k) is 4.10^–3
Ms^-1, how long will it take to reduce the initial concentration of NH₃ from 0.1 M to 0.064 M.

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Detailed Solution

The time required can be calculated from the following:
$\begin{matrix} t = \frac{[R]_{0} - [R]_{t}}{k} \\ = \frac{[0 .1 - 0 .064]}{4 \times 10^{- 3}} \\ = 9 s \end{matrix}$
It will take 9s to reduce the initial concentration of NH₃ from 0.1 M to 0.064 M.

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