The half-life (t1/2) of a first order reaction is 0.100 s. What is the rate constant?

a. 6.93 s-1
b. 0.693 s-1
c. 0.0693 s-1
d. 0.144 s-1
e. 3.01 s-1

0.693

6.93

Answers

To find the rate constant for a first-order reaction using the half-life (t1/2), you can use the following equation:

t1/2 = 0.693 / k

Where:
t1/2 = half-life of the reaction
k = rate constant

In this case, the given half-life is 0.100 s. By substituting the value in the equation, we can find the rate constant:

0.100 s = 0.693 / k

To solve for k, we can rearrange the equation:

k = 0.693 / 0.100

k ≈ 6.93 s-1

Therefore, the rate constant is approximately 6.93 s-1.

From the given options, the correct answer is:
a. 6.93 s-1

Same formula as above question.