How fast?

63%

The reaction below is first order with respect to reactant $Y\text{Y}$ .

\text{Y}(\text{aq}) \rightarrow \text{products}

When the initial concentration of $Y\text{Y}$ is 0.40 mol dm^-3, the half-life is $minutes25\text{ minutes}$ .

What is the half-life when the initial concentration of $Y\text{Y}$ is 1.20 mol dm^-3?

$minutes8.3\text{ minutes}$

$minutes25\text{ minutes}$

$minutes50\text{ minutes}$

$minutes75\text{ minutes}$

63%