The Reaction CH₃NC(g) → CH₃CN(g) Is First-Order with Respect to Methyl

question 32

Multiple Choice

The reaction CH₃NC(g) → CH₃CN(g) is first-order with respect to methyl isocyanide, CH₃NC. If it takes 10.3 minutes for exactly one quarter of the initial amount of methyl isocyanide to react, what is the rate constant in units of min^-1 ?

• A) -0.135 min^-1
• B) 0.0279 min^-1
• C) 0.089 min^-1
• D) 0.135 min^-1
• E) 35.8 min^-1