Chemistry concepts and calculations
117302 questions • Page 414 / 2347
A large company pays its salespeople on a commission basis. Thesalespeople recei
A large company pays its salespeople on a commission basis. Thesalespeople receive $200 per week, plus 9 percent of their grosssales for that week. For example, a salesperson who …
A large electrical power station generates 1000 MW of electricity with an effo -
A large electrical power station generates 1000 MW of electricity with an effo -Y of 25 % a) How much heat does the power station need to generate this amount of electricity in on…
A large pond has a volume of 8 million gallons and the flow into is one milion g
A large pond has a volume of 8 million gallons and the flow into is one milion gallons each day. A pollutant called BOD isin the inflow at 20 mg/L and it has a decay rate constant…
A large rectangular vessel is divided by a partition into two compartments of id
A large rectangular vessel is divided by a partition into two compartments of identical shape, size, and temperature. One mole of fluorine gas is placed in the left compartment an…
A large sport utility vehicle has a mass of 2500 kg . Part A Calculate the mass
A large sport utility vehicle has a mass of 2500 kg . Part A Calculate the mass of CO2 emitted into the atmosphere upon accelerating the SUV from 0.0 mph to 65.0 mph . Assume that…
A large sport utility vehicle has a mass of 2500 kg
A large sport utility vehicle has a mass of 2500 kg<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> Calculate the mass of CO2 emitted into the at…
A large, complex piece of apparatus has built into it a cooling system containin
A large, complex piece of apparatus has built into it a cooling system containing an unknown volume of cooling liquid. It is desired to measure the volume of the coolant without d…
A laser beam of diameter d-1.2 mm is directed along the optical axis of a thin l
A laser beam of diameter d-1.2 mm is directed along the optical axis of a thin lens of focal length +6.8 cm (see figure below). How far from the lens will the beam be focused? (b)…
A latex rubber balloon filled with SF6 and left in air (like in this room) will
A latex rubber balloon filled with SF6 and left in air (like in this room) will expand and ultimately burst. Explain how/why this happens using the kinetic theory of gases b. Ther…
A law firm designed the following table to keep track the information about case
A law firm designed the following table to keep track the information about cases and the lawyers who handle the cases: Case (caseNumber, caseDescription, lawyerInCharge, caseAssi…
A law firm designed the following table to keep track the information about case
A law firm designed the following table to keep track the information about cases and the lawyers who handle the cases: Case (caseNumber, caseDescription, lawyerInCharge, caseAssi…
A leachate sample has taken for treatment to a wastewater treatmentment plant wi
A leachate sample has taken for treatment to a wastewater treatmentment plant with a Complete mix reactor with aeration ditches and activated sludge. Through the monthly period, a…
A lead acid battery (ie, the battery in your car), when charged, contains electr
A lead acid battery (ie, the battery in your car), when charged, contains electrodes of solid lead (Pb) and lead dioxide (PbO2) immersed in a solution of sulfuric acid. The equili…
A lead bullet reaches a maximum speed of 2500 ft/s before it hits a wall. The he
A lead bullet reaches a maximum speed of 2500 ft/s before it hits a wall. The heat capacity of lead is 0.13 kJ/kg.K and the heat of melting is 22.4 kJ/kg. Lead melts at 328 C. You…
A lead bullet with a mass of 8.00 g and traveling at 5.00 times 10^4 cm/s is imb
A lead bullet with a mass of 8.00 g and traveling at 5.00 times 10^4 cm/s is imbedded in a wooden block weighing 1.000 kg. If both the block and the bullet were initially at 25.0 …
A least-squares curve fit of the data in the table to the right led to a best st
A least-squares curve fit of the data in the table to the right led to a best straight line with the equation y = 0.615x + 1.35. If the y value of a new measurement is 3.67, what …
A least-squares curve fit of the data in the table to the right led to a best st
A least-squares curve fit of the data in the table to the right led to a best straight line with the equation y = 0.615x + 1.35. If the y value of a new measurement is 3.67, what …
A least-squares curve fit of the data in the table x= 1,3,4,6 and y= 2,3,4,5 led
A least-squares curve fit of the data in the table x= 1,3,4,6 and y= 2,3,4,5 led to a best straight line with the equation y = 0.615x+1.35 (a) If the y value of a …
A least-squares curve fit of the data in the table x= 1,3,4,6 and y= 2,3,4,5 led
A least-squares curve fit of the data in the table x= 1,3,4,6 and y= 2,3,4,5 led to a best straight line with the equation y = 0.615x+1.35 (a) If the y value of a …
A led acid-battery is designed that the new battery contains 62.1 grams of lead
A led acid-battery is designed that the new battery contains 62.1 grams of lead for the anode and unknown grams of the lead dioxide for the cathode. If the anode material was and …
A light ray (yellow line) hits a mirror (thick horizontal gray line). Which diag
A light ray (yellow line) hits a mirror (thick horizontal gray line). Which diagram do you believe correctly shows the resulting ray (red line). A mirror is a polished surface tha…
A light ray comes directly at a surface and makes a right angle with the surface
A light ray comes directly at a surface and makes a right angle with the surface. What is the angle of incidence? What are the units for the slope of your graphs? What is the appr…
A light sensitive substance in black and white photographic film is AgBr (silver
A light sensitive substance in black and white photographic film is AgBr (silver bromide). Photons provide the energy necessary to transfer an electron from the anion, Br- to the …
A light-duty fuel cell vehicle will carry approximately 4-10kg of hydrogoen on b
A light-duty fuel cell vehicle will carry approximately 4-10kg of hydrogoen on board (depending on the size and type of the vehicle) to allow a driving range of more than 300 mile…
A lighter block ( 1 kg ) and a heavier block ( 2 kg ) sit on a frictionless surf
A lighter block (1 kg) and a heavier block (2 kg) sit on a frictionless surface. Both blocks are initially at rest. The same force of 4 N then pushes to the right on each block fo…
A lime juice sample takes the same volume of NaOH to neutralize compared to your
A lime juice sample takes the same volume of NaOH to neutralize compared to your apple juice sample, assuming the volume and dilution factor are the same. Do the two juice samples…
A linux server has Node.js installed with the http-server package. The server wi
A linux server has Node.js installed with the http-server package. The server will respond to requests on port 80 with a file in the same directory named index.html. An interestin…
A liquid equimolar mixture of carboon disulfide and chloroform Complete and prin
A liquid equimolar mixture of carboon disulfide and chloroform Complete and print the Worksheet in Aspen Hysys and the Graph from Excel for full credit provide a member are a that…
A liquid fuel containing 88 wt% C and 12% H is burned with air, comprising 21 vo
A liquid fuel containing 88 wt% C and 12% H is burned with air, comprising 21 vol% O2 and 79% N2, in a combustor. The combustion product is called “flue gas”, and the flue gas lea…
A liquid fuel containing 88 wt% C and 12% H is burned with air, comprising 21vol
A liquid fuel containing 88 wt% C and 12% H is burned with air, comprising 21vol% O2 and 79% N2, in a combustor. The combustion product is called "flue gas", and the flue gas leav…
A liquid fuel mixture contains 29.85 hexane , 16.00 heptane , and the rest octan
A liquid fuel mixture contains 29.85 hexane , 16.00 heptane , and the rest octane . What maximum mass of carbon dioxide is produced by the complete combustion of 13.0 kg of this f…
A liquid fuel, methanol, can be produced from coal and water. The final reaction
A liquid fuel, methanol, can be produced from coal and water. The final reaction in one process for doingthis conversion is given below. Using the standardenthalpy and entropy cha…
A liquid has an enthalpy of vaporization 30 kJ/moL. At 269 is loss a. What is th
A liquid has an enthalpy of vaporization 30 kJ/moL. At 269 is loss a. What is the normal boiling point of this liquid? (k = 8.314 J(K mol) 287 K 314 K 269 K 253 K 235 K Which of t…
A liquid is contained in a reactor vessel at 115 bar absolute pressure. It is tr
A liquid is contained in a reactor vessel at 115 bar absolute pressure. It is transferred to a storage vessel through a 50 mm internal diameter commercial steel pipe. The storage …
A liquid mixture at equilibrium with its vapor at 25 ºC comprises 35.8 g of benz
A liquid mixture at equilibrium with its vapor at 25 ºC comprises 35.8 g of benzene (subscript A) and 56.7 g of toluene (subscript B) in the liquid phase. At that temperature the …
A liquid mixture at equilibrium with its vapor at 25 ºC comprises 35.8 g of benz
A liquid mixture at equilibrium with its vapor at 25 ºC comprises 35.8 g of benzene (subscript A) and 56.7 g of toluene (subscript B) in the liquid phase. At that temperature the …
A liquid mixture containing 50 mole% propane, 30% w-butane, and 20% isobutane is
A liquid mixture containing 50 mole% propane, 30% w-butane, and 20% isobutane is stored in a rigid container at 77 degree F. The container has a maximum allowable working pressure…
A liquid mixture containing OO mo% benzene 250 mol% tol ere, and the balance rye
A liquid mixture containing OO mo% benzene 250 mol% tol ere, and the balance ryere is fed to a distillation column. The bottom s product contains Romo% rrere and no benzene, and 9…
A liquid mixture of 50 mol% chloroform (1) and 50% 1,4-dioxane(2) at 0.1013 MPa
A liquid mixture of 50 mol% chloroform (1) and 50% 1,4-dioxane(2) at 0.1013 MPa is metered into a flash drum through a valve. The mixture flashes into two phases inside the drum w…
A liquid mixture of 60 mol% n-hexane and 40 mol% n-heptane at 70°C and 850 torr
A liquid mixture of 60 mol% n-hexane and 40 mol% n-heptane at 70°C and 850 torr is compressed isothermally. Based on this information answer the following: a) Determine the bubble…
A liquid phase reaction A+B-->C is conducted in a 50-L batch reactor. The reacti
A liquid phase reaction A+B-->C is conducted in a 50-L batch reactor. The reaction is first-order with respect to each reactant. a) determine the time required for 90% conversi…
A liquid phase reaction, A --> B, is to be carried out in an isothermal, well mi
A liquid phase reaction, A --> B, is to be carried out in an isothermal, well mixed batch reactor with a volume of 1L. Initially there are 4 moles of A. The rate of destructio…
A liquid reaction A+B->C, r=kC_B*C_A^2 takes place in a CSTR of volume V_R in th
A liquid reaction A+B->C, r=kC_B*C_A^2 takes place in a CSTR of volume V_R in the presence of a large excess of reactants B. Assume the reactor achieves 50% conversion of A at …
A liquid stream containing 50.0mol% benzene and the balance toluene at 25°C at 5
A liquid stream containing 50.0mol% benzene and the balance toluene at 25°C at 5.00 atm (abs.) is fed to a continuous single-stage evaporator at a rate of 1000mol/s. The temperatu…
A liquid-vapor mixture has two components: n-hexane and n-octane. the compositio
A liquid-vapor mixture has two components: n-hexane and n-octane. the composition of the liquid phase is 50.0 mole % n-hexane, and 50 mole % n-octane at 3933 K. the vapor pressure…
A liquid/vapour mixture of water initially has a quality of 0.6. Which of the fo
A liquid/vapour mixture of water initially has a quality of 0.6. Which of the following statements will result in an increase in quality, if the final state remains as a liquid/va…
A liter of 0.050M pH 7.10 potassium phosphate buffer is needed for a certain exp
A liter of 0.050M pH 7.10 potassium phosphate buffer is needed for a certain experiment. The following four methods were proposed for the preparation of the buffer. Using the pKa …
A liter of pH 7.20 phosphate buffer is needed for a certain experiment. The Hend
A liter of pH 7.20 phosphate buffer is needed for a certain experiment. The Henderson-Hasselbach equation will be sufficiently accurate for your determination of pH. The pK’s for …
A liter of pH 7.20 phosphate buffer is needed for a certain experiment. The Hend
A liter of pH 7.20 phosphate buffer is needed for a certain experiment. The Henderson-Hasselbach equation will be sufficiently accurate for your determination of pH. The pK’s for …
A literature value for the melting point of acetanilide is 115 degree C. Why did
A literature value for the melting point of acetanilide is 115 degree C. Why did a student find the melting point to be 112-114 degree C in a capillary tube? Indicate the best ans…
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