The conversion of cyclobutane 
to ethylene 
is a first-order reaction. This means that the concentration of cyclobutane at time t is given by lnC=ln
?kt, where C is the concentration at time t, is the initial concentration, t is the time since the reaction started, and k is the rate constant. Assume that =0.2 mol/L with negligible uncertainty. After 300 seconds at a constant temperature, the
concentration is measured to be C=0.174 ± 0.005 mol/L. Assume that time can be measured with negligible uncertainty.
a. Estimate the rate constant k, and find the uncertainty in the estimate. The units of k will be 
.
b. Find the relative uncertainty in k.
c. The half-life 
of the reaction is the time it takes for the concentration to be reduced to one-half its initial value. The half-life is related to the rate constant by =(ln 2)/k. Using the result found in part (a), find the uncertainty in the half-life.
d. Find the relative uncertainty in the half-life.
You might also like to view...
How was Cortés initially greeted by the Mexica?
a. They seized him and held him prisoner until he was able to escape. b. They mostly ignored his presence bewildering him and his soldiers. c. They fought him off with every force that they could bring to bear. d. They lavished him with gifts and believed he descended from a god.
When a submersible pump is used in a metal well casing, the well casing is required to be bonded to
A. the pump circuit equipment grounding conductor. B. the pump circuit equipment grounding conductor only if the water pipe is nonmetallic. C. the grounding electrode conductor. D. the metal water pipe from the pump to the building.
Infections that can be transmitted by the blood are called _______________________
A) HIV B) Blood-borne pathogens C) Blood virus D) SARS
Technician A says that an EHI with a Piezo actuator is capable of breaking up a single injection cycle into up to 7 separate pulses. Technician B says that during a CR EHI multipulse injection cycle, the pressure rises through each successive pulse. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B