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Chemical Engineering Questions and Answers November 12, 2019

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hot gas stream containing reactant A(2lit/min,2atm,677K,1/6A and 5/6 inerts) and a cold gas stream onsisting of pure B(0.5lit/min,1.95atm,330K) flow into a mixed flow reactor (0.75 lit) kept at 440K and 1.3 tm where A and B react as follows A+2B6RrA=kCACB The partial pressure of A in the reactor and in the exit stream is 0.02899 atm. From this
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4.6 A stirred-tank blending system can be described by a first-order transfer function between the exit composition x and the inlet composition x1 (both are mass fractions of solute): Xi(s)X(s)=s+1K where K=0.6 (dimensionless) and =10min. When the blending system is at steady state (x=0.3), the dynamic behavior is tested by quickly adding a large
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A wastewater treatment plant is discharging its effluent to a river, and an unacceptably low level of dissolved oxygen ( < 6 mg / L ) occurs downstream. As a short - term measure until the treatment plant's design can be upgraded, the treatment plant operators are considering oxygenating their effluent. Given the stream and wastewater

a exhaust stream contains 1 8 8 0 ppm of n - pentane at 9 5 F . the flow rate to be treated is 5 5 0 0 acfm. carbon capacity is 3 . 5 lb n - pentane / 1 0 0 lb AC . carbon density is 3 0 lb / ft 3 . 2 bed system : 1 hr for adsorption and the other hr for regeneration. Mass flow rate of n - pentane? flow velocity? stream requirement? pressure drop?

Can someone help me step by step? 1. Using the Bohr model, for the n=3 state of hydrogen, find for the a) r b) T c) v d) U e) E f) the energy emitted by the n=3 to n=2 transition 2. Repeat problem 1 for 4He atom with a single electron, use n=3
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Solution purification is an important step in the upgrading of pregnant leach solutions from dump / heap leaching. With reference to Uranium processing compare and contrast the two main methods used for this process i . e . Solvent Extraction and Ion Exchange.

1) The partial oxidation of an olefin to produce an epoxide is catalyzed by supported Mo oxide. a) Write the general rate equations for the formation of each product . Ignore the reverse reaction since the equilibrium constant is very large. The formation of the desired product was determined to have a reaction order of 0.6 for olefin with the O 2

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100-foot long, 3 inch nominal diameter, schedule 40 steel pipe, carrying 200 gallons per minute (gpm) of water. Assume water is at 60F (density = 62.37 lbm/cu.ft. and viscosity 1.129 CP) as mentioned in the case data file. a) Provide the length of the pipe in meters (m) b) What is the inside diameter of the pipe in meters? c) What is the flow rate

6. (21%) A drier takes in wet timber (20.1% water) and roduces the water content to 8.6%. You want to determine the kg of water removed per kg of timber that enters the process. (a) Draw a flowchart. (b) Put the data in the problem on the flowchart. (c) Pick a basis. (d) Determine the number of unknowns and independent equations. (c) Write the
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b) Understanding of oxidative desulphurization kinetics is important if the e is ever a hope of making use of this technology at large scale. Dhis et al (2009) suggested the overall reaction and law rate equation given below for this process. RS+H2O2+H2ORSOH2O2RSO2+H2O(1+KnS[RS]+K0[0]+KK[RSSO]+K[W]2kKKo[RS][0]
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A hurricane can be thought of as a machine that generates wind with power supplied by latent heat released by condensation of water vapor to produce rain. Hurricane Harvey in 2 0 1 7 was for a time producing 1 inch per hour of rain over an area about 2 0 0 miles in diameter. Assuming that this is all produced by condensation, estimate the storm's
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P7.5 The liquid-phase irreversible reaction AB+C is carried out in a CSTR. To leam the rate law, the volumetric flow rate, v0. (hence =V/v0 ) is varied and the effluent concentrations of species A are recorded as a function of the space time . Pure A enters the reactor at a concentration of 2mol/dm3. Steady-state conditions exist when the
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1 . A liquid mixture is 3 0 % acetone and 7 0 % methanol by mole. The vapor pressure of pure acetone is 3 5 0 mmHg and for pure methanol, it's 2 8 0 mmHg . Calculate the total vapor pressure of the mixture using Raoult s Law.

Pure chlorobenzene is being used to recover pyridine from water (1000 kg/h, 40 wt% pyridine and 60 wt% water). a) A single stage mixer-settler system has been proposed to achieve an outlet extract that is 22 wt% pyridine. Determine the outlet extract and raffinate compositions as well as the % of pyridine recovered and solvent flow rate. b) For

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c) Although the precise mechanism of thiophene HDS reaction is still under debate. Borgna et al, 2003 used a simplified reaction network consisting of elementary steps, in which thiophene (TH) exclusively adsorbs on sulfur vacancies and H2 adsorbs dissociatively on different sites to form butadiene ( B) and H2S. Assuming that the surface reaction
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2 . A container is filled with a gas mixture of 4 0 % oxygen and 6 0 % nitrogen by volume. If the partial pressure of oxygen is 2 0 0 kPa, find the total pressure of the gas mixture using Dalton s Law.

4. The reaction ABC are conducted in a steady state isothermal, continuous stirred tank reactor. All reactions are of first order, with identical rate constants ( k ). The reactor volume (V) and volumetric flow rate (Q) are constant. If the feed consists of pure A at aconcentration CAo, formulate material balance equation for A, B, C
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3 For a 100keVSn ion in Si, calculate the energy going into displacement processes, v, from Eq. (7.18) (set E0=T ) and compare your answer with those given in Table 7.2 and Fig. 7.10. Table 7.2. Total amount of energy available for nuclear collisions, vp(E0) Taken from J. W. Mayer et al., Ion Implantation in Semiconductors (Academic Press, New
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A Prepare an input data file for simulating the performance of a two - phase ( water / oil ) reservoir. The model will have a regular shape, with two wells at opposite corners to simulate production in a quarter - five - spot pattern.
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A stream of 1 0 0 . K g m i n of a 8 0 . 0 % ( weight basis ) of sucrose in water at 9 0 C flows into a crystallizer. In this crystallizer water is removed by evaporation under vacuum. The evaporation results in a drop of temperature in the crystallizer to 3 0 C . Under the operating conditions, water is evaporated at a rate of 1 0 . 0 K g m i n .
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3. Consider a lake with a mixing time of a few weeks, and a total volume of 3106m3. The only significant sources of incoming water are a stream supplying 1.5106m3/ year and groundwater supplying 0.5106m3/y. Water exits the lake in stream flow at a rate of 1.5106 m3/ year and by evaporation at a rate of 0.5106m3/ year. The lake and stream water
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please solve in details and show that the PRESSURE WILL DECREASE.. 32. Consider a container of liquid that is held at its boiling temperature T at pressure P. A small amount of solute is added, but the temperature and pressure are maintained at their original values. Since the solute has elevated the boiling temperature, the system will condense
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A plate (E=30,000ksi;v=0.25;=6.5106/F) cannot expand in the y direction and can expand at most by 0.005 inch in the x direction as shown in Figure P5.3. Assuming plane stress, determine the average normal stresses in the x and y directions due to a uniform temperature increase of 100F
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Problem 2 E Chapter Problem Legendre Transformation for Ideal Gas Find the Helmholtz free energy A T , V , M by Legendre transformation of the internal energy U S , V , M implied by the entropy S ( U , V , M ) given in Exercise 4 . 1 .
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3 9 Example 2 - ADD - 3 : A tank with an outlet pipe is shown in Figure 2 - 1 8 . Calculate how the level of the liquid in the tank would drop with time. Additionally, list all the assumptions used. Figure 2 - 1 8
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1 3 . What role does relative volatility play in determining the ease of separation by distillation? 1 4 . Why is steam distillation particularly useful for the extraction of essential oils? 1 5 . How does the Gilliland correlation aid in the design of a distillation column? 1 6 . What factors influence the choice between using multiple feeds or

The quantitative effect of temperature on chemical equilibrium is given by the Vant - Hoff equation Le - Chatelier's principle Arrhenius equation None of these

When a chemical plant needs steam at multiple pressure levels, it is often economical to generate all the steam at a high pressure and then to let the steam down through pressurereducing turbines to the desired pressure. This principle is illustrated in Figure 8.6. The downside of this approach is that as the exhaust pressure of the turbine
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I need the complete solution please. there are other solutions available for this question but those are not Worthy so please Solve it completely. A planar solid slab of thickness L has a temperature To at its left-hand face (z=0). At the right-hand face (z=L), the solid is exposed to a surrounding fluid that has a temperature T(T0>T). Solid-fluid
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Using the griadratic interpolation method in optimization, find the minimum of f ( x ) = x 5 - 5 x 3 - 2 0 x + 5 . Take the triki length t = 0 . 5 , x 0 = 0 . 5 and = 0 . 0 1
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Question 8 The table below presents the average monthly flows received by a municipal wastewater treatment plant servicing a small residential community for the period from 2007 - 2010. (a) Determine the average annual flow, average dry-weather flow (ADWF), and average wet-weather flow for each year. Assume the dry season occurs from June to
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1. Describe the three things that a ventilator does to "mimic" or "support" the physiology of the lung 2. Describe three modes of ventilation and difference between them 3. Explain the difference between Positive Pressure and negative pressure
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3. For each of the following pairs of polymers, do the following: (1) state whether it is possible to decide whether one polymer has a higher tensile modulus than the other; (2) if this is possible, note which has the higher tensile modulus and then cite the reason(s) for your choice; and (3) if it is not possible to decide, then state why. (a)
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1) You a re tasked with designing an orifice meter to control the flowrate of fluids. Design Conditions You are required to do the following: a) Estimate the co-efficient of discharge and justify your reason. b) Design single orifice plate with D and D/2 pressure taps and vary the inlet pressure to achieve to get required mass flowrate at the
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1. If the MAOP of a pipeline is 1000 psig, and the diameter is 24in, what grade and wall thickness of pipe would you select to keep the hoop stress below 50%SMYS? 2. What is the estimated average hourly flow rate (MCFH) if the customer's monthly gas usage is 1000 CCF? 3. What is a heating degree day (HDD) and what HDD would you design to for New
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a) 0.001 moles of ammonia (NH3) are added to 1 liter of pure water. Determine the final pH, [NH4 +], and [NH3] in the solution. The pKa of NH4+ is 9.25. Hint: to solve, you will need to use a charge balance expression, equilibrium, and mass balance expressions. You can also assume that the concentration of [H+] is negligible compared to other

Name: Electron Configuration Some practice problems Do not abbreviate with noble gases for this first set: \ table [ [ Complete electron configuration:,Valence electrons: ] , [ \ table [ [ H :
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Solve and explain the solution to the attahced question
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Acetone is to be recovered from an acetone - methyl isobutyl ketone mixture in a liquid - liquid extractor using pure water as a solvent. Feed is \ ( 1 7 , 0 0 0 \ mathrm { lb } _ { \ mathrm { m } } \ ) hr and 4 0 weight percent acetone. The concentration of acetone in the raffinate is 5 weight percent. The extractor contains six theoretical

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3.11. How does the pH change for a 0.0001 M NH4Cl solution if one adds 0.01 mol Na2SO4 per liter? The Gntelberg approximation may be used to estimate the activity coefficients. 3.11. How does the pH change for a 0.0001MNH4Cl solution if one adds 0.01molNa2SO4 per liter? The Gntelberg approximation may be used to estimate the activity coefficients
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e ) A heat exchanger transfers heat from hot carbon dioxide to superheated steam. The steam flows inside tubes and the gas flows over the outside in a parallel direction. The steam is at 1 5 0 bar pressure absolute and is heated from 3 7 5 \ deg C to 4 5 0 \ deg C respectively. The carbon dioxide ( at atmospheric pressure ) is cooled from 6 2 0 \

During the flammability of different materials, your observation of: smoke ( Yes / No ) , flame height ( below 2 inches / between 2 - 4 inches / higher than 4 inches ) , and flaming debris ( Yes / No ) are: \ table [ [ Material , Smoke,Flame Height,Flaming Debris ] , [ ABS , Yes, 4 4 . 5 , No ] , [ TPE , Yes, 2 3 , yes ] , [ POM , Yes ( light
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Question 2 (15 pts). The equilibrium constant for the following gas phase reaction: CO+H2OCO2+H2 is expressed with the following formula: yCOyH2OyCO2yH2=Kc(T)=0.0247exp[4020/T(K)] where T is the reactor temperature, Ke is the reaction equilibrium constant, and is the mole fraction of species in the reactor contents at equilibrium. The feed to a
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Saturation of oxygen in water Oxygen can dissolve in water up to a saturation concentration that is dependent upon the temperature of water. The saturation concentration of dissolved oxygen in water can be calculated using the following empirical equation: ln sow 139:34411 1:575701 105 Ta 6:642308 107 T 2 a 1:243800 1010 T 3 a 8:621949 1011 T 4 a

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Consider the following gas phase reversible reaction: CH4+2H2OCO2+4H2 i. Find equilibrium constant at T=300C using Gibbs free energy approach. ii. Repeat part i using the assumption that Hr is constant. What can you learn from this comparison
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Photoionization detectors (PIDs) cannot detect the atmospheric gases nitrogen, oxygen, water, carbon monoxide, and carbon dioxide because their ionization potentials (IPs) are ... a. ... higher than 12eV. b.... lower than 12eV. c. ... approximately 12eV. d. None of the above
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Hello, i need help with this chemical engineering problem (please provide every step for the resolution, i would prefer if you send me pics of all the steps). A patient after surgery has lost a considerable volume of blood with a consequent decrease in the concentration of hemoglobin. We are interested in studying the processes leading to the

4. Iyi izole edilmi rijit bir tankda 100kPa basnta 5kg doymu siv-buhar karm su bulunmaktadr. Balangta, toplam ktlenin \$/4' sv fazdadr. Tank iindeki rezistans 110V bir kaynaa balanp 8A akm geirilmektedir. Tank iindeki svnn tamamnn buharlamas iin ne kadar zaman gerektiini hesaplaymuz. Islemi bir T-v diyagramnda doymus siv ve buhar erileri ile
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i ) Wet steam of 9 0 % steam quality and 6 5 . 0 bar passes through a valve and is throttled down to a pressure of 1 . 0 0 bar. What is the steam quality and entropy of the outlet stream? You may assume the process is adiabatic and potential / kinetic energy changes are negligible. ii ) Wet steam of 9 0 % steam quality and 6 0 . 0 bar is
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Pure oxygen is mixed with air to produce an enriched air containing 5 0 volume % of oxygen. The ratio of moles of air to oxygen used is 1 . 7 2 0 . 5 8 0 . 5 0 . 2

Problem 1 For the problem, the system is a mall and its interior. During the day, the mall is open and temperature controlled (constant temperature), but at night the air conditioning is shut down and the mall doors are locked. (a) During the day is the system open or closed? What about at night? (Discount the movement of air when answering) (b)

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1 3 . 2 0 A 1 5 - cm diameter wrought - iron pipe is to carry water at 2 0 C . Assuming a level pipe, determine the volumetric flow rate at the discharge if the pressure loss is not permitted to exceed 3 0 . 0 kPa per 1 0 0 m .
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Answer please urgent A chemistry graduate student is studying the rate of this reaction: ClCH2CH2Cl(g)CH2CHCl(g)+HCl(g) He fills a reaction vessel with ClCH2CH2Cl and measures its concentration as the reaction proceeds: Use this data to answer the following questions
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Hydration and related reactions (Addition of H2O or ROH ) Select ALL that Apply methanol tert-butyl methyl ether MTBE A bond is broken. alcohol +H2OH2SO4 Credit: Smith, Organic Chemistry p. 418 The mechanism has three steps. Carbocations are not formed as intermediates. Carbocation rearrangements are not possible. Markovnikov's rule is not
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While the oxy - acetylene flame produces a temperature of 3 2 0 0 C , the temperature produced by oxy - hydrogen flame is about _ _ _ _ _ _ _ _ _ _ C . 1 8 0 0 2 0 0 0 2 4 0 0 3 0 0 0

The following batch data are available for a liquid phase reaction A->R. CA(moles/L) 0.1 0.2 0.3 0.4 0.6 0.8 1.2 -rA (moles/L-min) 0.1 0.3 0.5 0.6 0.25 0.06 0.045 (a) How long will it take for the concentration to decrease from 1.2 to 0.2 moles/L? (b) The same reaction is to be carried out in a plug floe reactor of unknown volume followed by a

TOPIC: Choose a design of any heat transfer process unit and answer the following questions: > Explain the reasons why you chose that specific design. - Explain the procedure or mode of operation of that design. > Give the advantages and disadvantages of that design. > Contribution of that design to the society
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an interesting concept to generate the oxygen needed for the 2000 humans living in this habitat. Oxygen is a by-product of the Aluminum production, which is the major industry of the habitat: Ore is mined from the surface of the moon by robots. For simplicity we assume that this ore consists of equimolar amounts of Aluminumoxide (Al2O3) and
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8) A centrifuge bowl with 200mm ID(internal diameter) is turning at 3500r/min. It contains a layer of aniline 55mm thick. If the density of aniline is 1002kg/m3 and the pressure at the liquid surface is atmospheric, 1. returning angular velocity is A OX) 366.5rad/s;B 6798rad/s;CO)3667; D O) none 2. The gauge pressure exerted on the wall of the
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3. Using the method: a) Set up the vapor-liquid equilibrium expressions for a binary mixture (make NO assumptions) b) For an isothermal bubble-point calculation (given T and x1 ), show the expressions for total Pressure (P) and vapor-phase concentrations, assuming an ideal vapor phase and a relatively low total pressure
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Question in Chemical Engineering Please Give Correct answer im preparing please otherwise I will dislike 4 5 6

With decrease in the grain size of a material, its creep resistance Increases Decreases Remain constant Either ( A ) or ( B ) ; depends on the material

Can you explain in detail The reaction AB is to be carried out isothermally in a continuous-flow reactor. The entering volumetric flow rate v0 is 10 dm3/h. (Note: FA=CAv. For a constant volumetric flow rate v=v0, then FA=CAv0. Also, CA0=FA0/v0=([5mol/h]/[10dm3/h])0.5mol/dm3) Calculate both the CSTR and PFR reactor volumes necessary to consume 99%
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Over a 0.1m0.1m sheet at 175C, air flows at 25C and 1 bar with a velocity of 1m/s. Calculate the heat flux dissipated by the plate, proposing that the individual coefficient of mean film is b. Q=180W/h C. Q=18W/h d. Q=1,800W e. Q=18W
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The winds are generated due to 2 - The PV cells are made of silicon aliy silicon alloys ( 3 . Solar cookers absorb to produce electricity. surtiont and convert it into. heat. Con pres is formed is formed behind the blades of the wind turbine and cause the uet effect Solar distillation is used for Betz's limit is . . The . Thesretical maxiumm power
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Provide the matlab code for part 3 2. Fluid Compressibility (15\%) The compressibility of crude oil above bubble point pressure is c0=105psi1, constant. The compressibility of ideal gas cg=1/p, psi-1 where p is the system pressure. Use the definition of compressibility coefficient to derive the following volume-pressure relationship: a) Volume of
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Problem 3 Use of psychrometric charts Prior to the combustion of coal, it is dried to remove moisture. The moisture content in coal varies widely. For this problem consider a coal that contains 20wt% moisture. A dryer is to be designed to dry the 1 tonne of dry coal per hour. In order to accomplish this, dry air at 120C is introduced in a
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The normal boiling point of acetone [(CH3)2CO:MW58.08g/mol] is 56.1C, and its molar enthalpy of vaporization is 29.1k/ mol. 13 th attempt Part 1 (1 point) Feedback What is the molar entropy of vaporization of 56.5g of acetone? molar Svap= J/(molK) Part 2 (1 point) Feedback What is the total entropy of vaporization of 56.5g of acetone? total Svap=0
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QUESTION 1 The space time should be clearly distanced from the mean residence time. In which of the following conditions, the space time is the same as the mean residence time? At high impeller speed. Inlet volumetric flow rate is the same as the outlet volumetric flowrate When the temperature is constant constant velocity streams
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What mixture seemed to give the loudest reports? Is this result consistent with the ratio predicted by the balanced equation ( #B - 3 ) ? Explain your answer . 8 . Could the figures below serve as a model for any of the mixtures you tested above? Explain your answer . 9 . Describe the results of your rocket launch. What parameters affect the

Microspheres can be used as a means drug delivery through either oral or injectable administration, and have been tested in a variety of treatments, including multiple forms of cancer. Because these microspheres can be designed to degrade over time, they can provide a means of targeting specific areas of the body with a therapedic dose of drug for
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