For the reaction. $2 \mathrm{~A}+\mathrm{B} \rightarrow 2 \mathrm{C}$, rate of disappearance of $\mathrm{A}$…
For the reaction. $2 \mathrm{~A}+\mathrm{B} \rightarrow 2 \mathrm{C}$, rate of disappearance of $\mathrm{A}$ is $0.076 \mathrm{~mol} \mathrm{~s}^{-1}$. What is the rate of disappearance of B?
$0.076 \mathrm{~mol} \mathrm{~s}^{-1}$
$0.038 \mathrm{~mol} \mathrm{~s}^{-1}$
$0.019 \mathrm{~mol} \mathrm{~s}^{-1}$
$0.095 \mathrm{~mol} \mathrm{~s}^{-1}$
Solution
$2 \mathrm{~A}+\mathrm{B} \longrightarrow 2 \mathrm{C}$
$\frac{\text { Rate of disappearance of A }}{2}=\frac{\text { Rate of disappearance of B }}{1}$
Rate of disappearance of $\mathrm{B}=\frac{1}{2} \times 0.076$
$=0.038 \mathrm{~mol} \mathrm{~s}^{-1}$