Question

What is the concentration of the reactant in a first order reaction when the rate of the reaction is 0.6 s^-1 and the rate constant is 0.035?

(a) 26.667 M

(b) 17.143 M

(c) 26.183 M

(d) 17.667 M

This question was posed to me during an online exam.

I would like to ask this question from Rate of a Chemical Reaction in division Chemical Kinetics of Chemistry – Class 12

Answer 1

Correct option is (b) 17.143 M

Best explanation: Given, R=0.6 s^-1 and k= 0.035

For a first order reaction R= k [A]

[A]=\(\frac{R}{k}\) = \(\frac{0.6}{0.035}\) = 17.143 M.