What is half life time of a first order reaction if initial conc. of reactant is $0.01 \mathrm{~mol} \mathrm{~L}^{-1}$ and rate of reaction is $0.00352 \mathrm{~mol} \mathrm{~L}^{-1}$ minute ${ }^{-1}$ ?

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Aicharya · Accepted Answer

For a first order reaction, rate $=\mathrm{k}[\mathrm{A}]$ $\begin{aligned} & 	herefore \quad \begin{array}{l} 0.00352 \mathrm{~mol} \mathrm{~L}^{-1} 	ext { minute } \ \mathrm{k}=0.352 	ext { minute }^{-1} \end{array} \ & \begin{aligned} 	ext { Half-life period, }\left(\mathrm{t}_{1 / 2}ight)=\frac{0.693}{\mathrm{k}} & =\frac{0.693}{0.352} \ & =1.969 	ext { minute } \end{aligned} \end{aligned}$

What is half life time of a first order reaction if initial conc. of reactant is $0.01 \mathrm{~mol}…

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