Question

The reaction
$N_{2}O_{5}\left(in\, CCl_4 solution\right)\to2NO_{2}\left(solution\right)+\frac{1}{2}O_{2}\left(g\right)$ is
of first order in $N_2O_5$ with rate constant $6.2 \times 10^{-1} s^{-1}$ What is the value of rate of reaction when $\left[N_{2}O_{5}\right]=1.25$ mole?

• A. $7.75 \times 10^{-1} mole^{-1}s^{-1}$
• B. $6.35 \times 10^{-3} mole^{-1}s^{-1}$
• C. $5.15\times 10^{-5} mole^{-1}s^{-1}$
• D. $3.85 \times 10-1 mole^{-1}s^{-1}$

Answer 1

Answer: (A)

$Rate=K\left(N_{2}O_{5}\right)=6.2\times10^{-1}\times1.25$
$=7.75\times10^{-1} mol^{-1}s^{-1}$