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A reaction in a batch system is assumed to be first order. Data listed below was collected. Determine the reaction rate constant.
chemical concentration (ug/L) time(min)19.3 626.0 932.6 1236.0 1441.3 1845.0 2246.5 2447.4 2650.4 3058.3 infinite
A continuous distillation column containing plates is required to distil a 46% w/w ethanol (C2H5OH) in water solution. The overhead product must contain 91 % w/w ethanol and the bottom product 5 % w/w ethanol.
Conditions in the sewage pipe are Qs= 0.5 m^3/s, and Cs= 100mg/L. The pollutant is destroyed in the lake with a first-order rate constant of 0.2/d. The flow rate out of the lake is 5.0 m^3/s.
A rectangular open channel with a width of 10 ft and n = 0.013 conveys a discharge of 300 cfs. The upstream portion of the channel has a slope of 10%, which then abruptly changes to a slope of zero downstream.
Chemical ‘x' is regulated by EPA and the maximum allowable concentration in water is 10g/L. 1000 kg of chemical ‘x' is released in a lake (volume 1,000 m3) where it undergoes degradation as a first order reaction process
plane gate of uniform thickness holds back a depth of water. Find the minimum weight need to keep the gate closed. theta=30degrees L = 3m w = 2m
How much contact time would be reuired for inactivating Giardia cysts using the following chemicals at the concentrations and temperatures stated: a. Chlorine Dioxide, 23C, 1.0 mg/L b. Chlorine, 12C, 1.6 mg/L c. Ozone, 10C, 5 mg/L d. Chloramines, ..
A contaminant in water is traveling through a saturated clay layer under a hydraulic gradient of 0.15. The clay has a hydraulic conductivity of 2 x 10^(-7) cm/s, a moisture content of 19%, and a Gs of 2.65.
what are the three meterials based on the predominant types of bond and what are the predominant types of bond in each category
After falling from rest from a height of 32 m, a 0.45 kg ball rebounds upward, reaching a height of 22 m. If the contact between ball and ground lasted 1.5 ms, what average force was exerted on the ball?
Determine the unstretched length of spring AC if a force P = 110 lb causes the angle theta = 60^circ for equilibrium. Cord AB is 2 {rm ft} long. Take k = 50;{rm lb/ft}
Estimate the effective friction angle for the sand (assume c' = 0). Calculate the sand's shear strength (τf) on a horizontal plane at depths of the 20 ft and 50 ft.
The company would like to distribute the songs between the two CDs such that the used space on each CD is about the same. Formulate the problem as an IP, and find the optimal solution.
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