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Question

The rate equation for a reaction: $A \rightarrow B$ is $r = K[A]^0$. If the initial concentration of the reactant is $a \, \text{mol} \, \text{dm}^{-3}$, the half-life of the reaction is:

$\frac{a}{K}$

$\frac{2a}{K}$

$\frac{K}{a}$

$\frac{K}{2a}$

Solution

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