Question

Based on the following reaction and rate data:
$A\left(g\right)+B\left(g\right)\to products$

Experiment	$\left[A\right]$ mol/L	$\left[B\right]$ mol/L	Initial Rate (M/s)
1	0.060	0.010	0.040
2	0.030	0.010	0.040
3	0.030	0.020	0.080

What is the rate constant?

• A. 0
• B. 1
• C. 2
• D. 3
• E. 4

Answer 1

The correct option is E 4

The reaction is zero order with respect to $A$ and first order with respect to $B$. so rate expression can be written as

$Rate$$=$$K\times \left[B\right]$

Taking values from row 1 Rate $=$0.04 and $\left[B\right]$$=$0.01

so $K$$=$$.04/.01$$=$$4$