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In a batch process, you want to concentrate a dilute acid containing 30 wt% H2PO4 and 70 wt% H2O by adding concentrated acid (90 wt% H2PO4, 5.0 wt% H2SO4, and 5.0 wt% H2O). If a tank contains 1000 kg of the dilute acid and the concentrated acid is added at a rate of 100 kg/min, how long will it take to bring dilute acid strength to 75 wt% H2PO4? What will be the final chemical composition and weight of the final mixture which is removed from the tank?
a car is traveling at sea level at 78 mi/h on a 4% upgrade before the driver sees a fallen tree in the roadway 150 feet away. the coefficient of road adhesion is 0.8. The car weighs 2700 lbs, has a drag coefficiant of 0.35, a frontal area of 18 ft..
Weighting these by their global warming potentials, what fractionof the total impact of that year's emissions of these three gaseswould be caused by each gas over the following time periods?
a) The maximum flow rate that can be achieved without cavitation occurring in the piping system. b) The maximum elevation of the highest point of the piping system to avoid cavitation.
A simple highway curve is planned to connect two horizontal tangents that intersect at sta. 2500+00.00 at an external angle of 52°. For a design speed of 60 mi/h and a curve radius of about 1.25 times the minimum allowable
The partial pressure of the gasses in a 22,414-L volume of air at STP are: oxygen, 21,224 kPa; nitrogen, 79,119 kPa; argon, 0.946 kPa; and carbondioxide, 0.036 kPa. Determine the gram molecular weight of air.
You have a stream of air containing methanol at 5% by volume. The stream is flowing at 2000 actual ft^3/min at 1 atm pressure and 110 F. The regulations require94% removal of the methanol, and you decide to try a water absorption column, using pure w..
What is the equivalency factor for the 14 kip single axle?
Characteristic values of the shear strength parameters of the soil are c'= 0, and f' = 400. Determine the required width of the footing if a factor of safety of 3.0 against shear failure is specified when the water table rise to foundation level.
A well mixed sewage lagoon is to be constructed to process 100,000 gallons per day of raw sewage. The pollutant concentration in the raw sewage to be discharged into the lagoon is 200ppm.
A monorail train starts from rest on a curve of radius 400 m and accelerates at the constant rate a_t. If the maximum total acceleration of the train must not exceed 1.5 m/s^2, determine
The symmetrical scissors truss shown below is supported atpoint A and D. The support at D is a rocker bearing and does notproduce a horizontal reaction. A, B, C, D, E & F are pinjoints.
1. the maximum eight-hour average concentration of carbon monoxide co in an urban area is measured to be 15 ppm. the
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