Question

Starting with one of compound x, it is found that the reaction is 3/4 completed in one hour. The rate constant, if the reaction follows first order is:

• A. $2.31mi{n}^{-1}$
• B. $0.0231mi{n}^{-1}$
• C. $0.0231se{c}^{-1}$
• D. $231se{c}^{-1}$

Answer 1

Answer: (B)

$0.0231mi{n}^{-1}$

$k=\frac{1}{t}ln\left[\frac{a}{a-x}\right]$

$=\frac{1}{t}ln\left[\frac{a}{a-\frac{3}{4}a}\right]$

$=\frac{ln\left[4\right]}{60min}$

$=0.0231mi{n}^{-1}$

Option B is correct.