Butadiene (C4H6) reacts with itself to form a dimer with the formula C8H12. The reaction is second order in C4H6. If the rate constant at a particular temperature is 4.0×10−2M−1s−1 and the initial concentration of C4H6 is 2.40×10−2 M .

Part A

What is its molarity after a reaction time of 1.00 h ?

Express your answer using two significant figures.

C4H6=?M

Part B

What is the time (in hours) when the C4H6 concentration reaches a value of 2.40×10−3 M ?

Express your answer using two significant figures.

T=?hours