The reaction AB$($aq$)->$A$($g$)+$B$($g$)$ is second order in AB and has a rate constant of $0\mathrm{.}0218$ M$1$s$1$ at $25\mathrm{.}0$C$.$ A reaction vessel initially contains $250\mathrm{.}0$ mL of $0\mathrm{.}134$ M AB which is allowed to react to form the gaseous product. The product is collected over water at $25\mathrm{.}0$C

How much time is required to produce $201\mathrm{.}0$ mL of the products at a barometric pressure of $757\mathrm{.}0$ mmHg$.($The vapor pressure of water at this temperature is $23\mathrm{.}8$ mmHg$)$

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