1. 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 1.80×10-2M. The molarity after 1.00hr is 5.0 x 10-3 M.
What is the time (in hours) when the C4H6concentration reaches a value of 1.80×10-3 M?
Express answer using two significant figures.