A aqueous mixture initially contains of solid reactant R (molar mass = )

CHEMISTRY · Subjective · AP · Chemistry · Kinetics · Kinetics

Problem

250.0\,\text{mL}

aqueous mixture initially contains

0.500\,\text{g}

of solid reactant R (molar mass =

100\,\text{g}\cdot\text{mol}^{-1}

). After

45.0\,\text{s}

0.380\,\text{g}

of R remains. Determine the average rate of consumption of R (

\text{mol}\cdot\text{L}^{-1}\cdot\text{s}^{-1}

) for this interval, showing the correct sign.