Jenny, a scheduler at Mangel-Wurzel Transport, gets a call from a regular customer needing to move of rock and soil, which Jenny knows from previous experience has an average density of . Jenny has available a dump truck with a capacity of and a maximum safe load of . Calculate the number of trips the dump truck will have to make to haul the customer's load away.

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

Avariable that is not being directly tested during an experiment should be

What if it is did darwin used to support his theory of evolution