For the reaction

CHEMISTRY · Single correct · A Level · Chemistry · Rate equations · Rate equations

Problem

For the reaction

2\text{A}\rightarrow 3\text{B}

, which expression correctly relates the average rate of formation of B to the average rate of disappearance of A? (a)

\dfrac{\Delta[\text{B}]}{\Delta t}=\dfrac{2}{3}\left(-\dfrac{\Delta[\text{A}]}{\Delta t}\right)

(b)

\dfrac{\Delta[\text{B}]}{\Delta t}=\dfrac{3}{2}\left(-\dfrac{\Delta[\text{A}]}{\Delta t}\right)

(c)

\dfrac{\Delta[\text{B}]}{\Delta t}=3\left(-\dfrac{\Delta[\text{A}]}{\Delta t}\right)

(d)

\dfrac{\Delta[\text{B}]}{\Delta t}=\dfrac{3}{2}\,\dfrac{\Delta[\text{A}]}{\Delta t}