Solid potassium chlorate decomposes according to

CHEMISTRY · Single correct · A Level · Chemistry · Kinetics · Kinetics

Problem

2\text{KClO}_{3}\,(s) \rightarrow 2\text{KCl}\,(s) + 3\text{O}_{2}\,(g)

. In a sealed

10.0\,\text{L}

vessel, the concentration of

O_{2}

increases at

1.20 \times 10^{-3}\,\text{mol}\,\text{L}^{-1}\,\text{s}^{-1}

. At what mass rate (

\text{g}\,\text{s}^{-1}

) does

\text{KClO}_{3}

decompose? (Molar mass

\,\text{KClO}_{3} = 122.55\,\text{g}\,\text{mol}^{-1}

.) (a)

1.50\,\text{g}\,\text{s}^{-1}

(b)

0.98\,\text{g}\,\text{s}^{-1}

(c)

0.65\,\text{g}\,\text{s}^{-1}

(d)

0.33\,\text{g}\,\text{s}^{-1}