Chemistry concepts and calculations
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A microbial cell may be modeled as a well-mixed reactor in which nutrients (“cor
A microbial cell may be modeled as a well-mixed reactor in which nutrients (“corn steep liquor”) diffuse into the cell and are converted to products (including penicillin) which d…
A microbiologist performed a protein extraction from E.coli cells. After the ext
A microbiologist performed a protein extraction from E.coli cells. After the extraction she did her best to separate the various impurities from the protein of interest in the sam…
A microbiologist performed a protein extraction from E.coli cells. After the ext
A microbiologist performed a protein extraction from E.coli cells. After the extraction she did her best to separate the various impurities from the protein of interest in the sam…
A microbiologist was studying the bacterium, Francisella tularensis, which can i
A microbiologist was studying the bacterium, Francisella tularensis, which can infect human neutrophils (PMNs) and cause the serious disease, tularemia. To study the growth of F t…
A microfluidic device consists of microchannels etched into a glass chip. The li
A microfluidic device consists of microchannels etched into a glass chip. The liquid sample is then moved through the channels using electroosmosis. A particular microfluidic devi…
A microorganism has a mass doubling time of 2.4 hr when grown on a certain subst
A microorganism has a mass doubling time of 2.4 hr when grown on a certain substrate. The saturation constant using this substrate K_s is 1.3 g/L and maximum growth rate mu_m of 0…
A midnight dumper discharged a tank truck full of industrial waste in a gravel p
A midnight dumper discharged a tank truck full of industrial waste in a gravel pit. The truck was spotted there 3 days ago, and a pool of pure waste remains. A laboratory technici…
A midnight dumper discharged a tank truck full of industrial waste in a gravel p
A midnight dumper discharged a tank truck full of industrial waste in a gravel pit. The truck was spotted there 3 days ago, and a pool of pure waste remains. A laboratory technici…
A milk carton can hold 3.78 liters of milk. Each morning, a daily farm ships car
A milk carton can hold 3.78 liters of milk. Each morning, a daily farm ships cartons of milk to a local grocery store. The cost of producing one liter of milk is $0.38, and the pr…
A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini
A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini-fridge has a temperature of 306 K. Every fifteen minutes, 2.32 × 105 J of energy is transferred ou…
A minimum-boiling azeotrope boils al a temperature that is lower than either of
A minimum-boiling azeotrope boils al a temperature that is lower than either of its components. Why? acetone (bp 56 degree C) and cyclohexane (bp 80 degree C) form a minimum boili…
A mining operation needs to separate silver and copper. You are hired as a summe
A mining operation needs to separate silver and copper. You are hired as a summer beautiful Colorado mining town, and one of your tasks is to determine whether this separation can…
A mitochondrial membrane complex consisting of ATP synthase, adenine nucleotide
A mitochondrial membrane complex consisting of ATP synthase, adenine nucleotide trnnsloca.se (ATP-ADP translocase). and phosphate translocase functions in oxidative phosphorylatio…
A mix-up at a local distribution company has occurred and the company needs you
A mix-up at a local distribution company has occurred and the company needs you to help straighten things out. You will be given one set of six bottles, the contents of each of th…
A mixed hydrocarbon fuel of butane (C4H10) and propane (C3H8) is burned in air (
A mixed hydrocarbon fuel of butane (C4H10) and propane (C3H8) is burned in air (molar ratio of 3.76 N2: 1 O2). The feed to the reactor (fuel + air) is at 200°C and 1 atm combines …
A mixed melting point determination is occasionally used to identify a substance
A mixed melting point determination is occasionally used to identify a substance. In this procedure, a compound of suspected identity is mixed with an authentic sample of the subs…
A mixture 0. 500 mole of carbon monoxide and 0. 400 mole of bromine was placed i
A mixture 0. 500 mole of carbon monoxide and 0. 400 mole of bromine was placed into a rigid 1. 00 - L container and the system was allowed to come to equilibrium. The equilibrium …
A mixture at 827 degrees celsius in a fixed volume containercontains 0.552 moles
A mixture at 827 degrees celsius in a fixed volume containercontains 0.552 moles CO2, 0.552 moles of H2, 0.448 moles of CO, and0.448 moles of H2O. Calculate Qc for this reaction. …
A mixture consisting of .10 mol H2 and .10 mol Br2 is placedi n a container of v
A mixture consisting of .10 mol H2 and .10 mol Br2 is placedi n a container of volume 2.0 L. The reaction H2 + Br --> 2 HBr is allowed to come to equilbrium. Then .20 mol HBr i…
A mixture consists of lithium carbonate (Li 2 CO 3 ) and potassium carbonate (K
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. When 5.614 g of this mixture was analyzed, it cons…
A mixture consists of lithium carbonate (Li 2 CO 3 ) and potassium carbonate (K
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. When 5.614 g of this mixture was analyzed, it cons…
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3)
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. Li2CO3(s) + 2HCl(aq)2LiCl(aq) + H2O + CO2(g) K2CO3…
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3)
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. Li2CO3(s) + 2HCl(aq)2LiCl(aq) + H2O + CO2(g) K2CO3…
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3)
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. Li2CO3(s) + 2HCl(aq)2LiCl(aq) + H2O + CO2(g) K2CO3…
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3)
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows. Li2CO3(s) + 2HCl(aq)2LiCl(aq) + H2O + CO2(g) K2CO3…
A mixture containing 0.250 mol SbCl3, 0.250 mol Cl2, and 0.500 mol SbCl5 comes t
A mixture containing 0.250 mol SbCl3, 0.250 mol Cl2, and 0.500 mol SbCl5 comes to equilibrium in a 5.00 L vessel at 648 deg celsius. SbCl3 + Cl2 <----> SbCl5 Kc = 40.0 Deter…
A mixture containing 3.01 g each of CH4(g), C2H4(g) and C4H10(g) is contained in
A mixture containing 3.01 g each of CH4(g), C2H4(g) and C4H10(g) is contained in a 1.50 L flask at a temperature of 45 degree C. (a) Calculate the partial pressure of each of the …
A mixture containing 3.7 moles of NO and 0.88 mole of CO2 was allowed to react i
A mixture containing 3.7 moles of NO and 0.88 mole of CO2 was allowed to react in a flask at a certain temp according to the equation.... NO + CO2 <---> NO2 + CO At equilibr…
A mixture containing 3.7 moles of NO and 0.88 mole of CO2 was allowed to react i
A mixture containing 3.7 moles of NO and 0.88 mole of CO2 was allowed to react in a flask at a certain temp according to the equation.... NO + CO2 <---> NO2 + CO At equilibr…
A mixture containing 45% benzene (B) and 55% toluene (T) by mass is fed to a dis
A mixture containing 45% benzene (B) and 55% toluene (T) by mass is fed to a distillation column. An overhead stream of 95 wt% B is produced, and 8% of the benzene fed to the colu…
A mixture containing 45% benzene (B) and 55% toluene (T) by mass is fed to a dis
A mixture containing 45% benzene (B) and 55% toluene (T) by mass is fed to a distillation column an overhead stream of 95% B is produced, and 8% of the benzene fed to the column l…
A mixture containing Ca2+ and Pb2+ can be separated by selectively precipitating
A mixture containing Ca2+ and Pb2+ can be separated by selectively precipitating one of the ions while the other remains in solutions. Which compound should be added for this sepa…
A mixture containing KClO3,K2CO3,KHCO3, and KCl was heated, producing CO2,O2, an
A mixture containing KClO3,K2CO3,KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations: 2KClO3(s)?2KCl(s)+3O2(g)2KHCO3(s)?K2O(s)+H2O(g)+2…
A mixture containing an unknown percentage of salicylic acid is prepared by diss
A mixture containing an unknown percentage of salicylic acid is prepared by dissolving 0.325 g of impure salicylic acid in ethanol/water in a 250 mL volumetric flask. This solutio…
A mixture containing the compounds below was separated by normal-phase thin-laye
A mixture containing the compounds below was separated by normal-phase thin-layer chromatography, using silica gel as a stationary phase and a 1:1 mixture of hexane and ethyl acet…
A mixture containing three compounds (A-C, see below) will be purified by normal
A mixture containing three compounds (A-C, see below) will be purified by normal- phase column chromatography, using silica gel as the stationary phase and hexanes:ethyl acetate a…
A mixture contains 20 mol% ethanol and 80 mol% ethyl acetate. If the operating p
A mixture contains 20 mol% ethanol and 80 mol% ethyl acetate. If the operating pressure is 101.32 kPa, Find (using Rachford - Rice flash equations): Bubble point temperature Dew p…
A mixture contains 58.50 % BaCl2 and 41.50 % Na3PO4 by weight. When dissolved in
A mixture contains 58.50 % BaCl2 and 41.50 % Na3PO4 by weight. When dissolved in water, the following double displacement reaction forms the barium phosphate precipitate. If you s…
A mixture contains Al2O3 (s) [MW=101.96 g/mol] and Fe2O3 (s) [MW=159.69 g/mol] a
A mixture contains Al2O3 (s) [MW=101.96 g/mol] and Fe2O3 (s) [MW=159.69 g/mol] and weighs 1.983g. when heated under excess hydrogen gas, the iron oxide reacts to form water vapor …
A mixture contains only NaCl and Al 2 (SO 4 ) 3 . A 3.47-g sample of the mixture
A mixture contains only NaCl and Al2(SO4)3. A 3.47-g sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Al(OH)3. The precipitat…
A mixture having a volume of 10.00 mL and containing 0.1000 M Ag+ and 0.04500 M
A mixture having a volume of 10.00 mL and containing 0.1000 M Ag+ and 0.04500 M Hg22+ was titrated with 0.0800 M KCN to precipitate Hg2(CN)2 and AgCN. (a) Explain which salt will …
A mixture initially contains A, B, and C in the following concentrations: [A] =
A mixture initially contains A, B, and C in the following concentrations: [A] = 0.700 M , [B] = 0.600 M, and [C] = 0.400 M . The following reaction occurs and equilibrium is estab…
A mixture initially contains A, B, and C in the following concentrations: [A] =
A mixture initially contains A, B, and C in the following concentrations: [A] = 0.400 M , [B] = 1.05 M, and [C] = 0.300 M . The following reaction occurs and equilibrium is establ…
A mixture is 11 mol% ethanol, 79 mol% ethyl acetate (C4H8O2) and 10 mol% acetic
A mixture is 11 mol% ethanol, 79 mol% ethyl acetate (C4H8O2) and 10 mol% acetic acid (C2H4O2). (a) Calculate the mass fraction of ethanol in this three-component mixture. (b) What…
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of…
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M
A mixture is prepared by adding 22.7 mL of 0.157 M Na3PO4 to 31.2 mL of 0.277 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of…
A mixture is prepared by adding 26.3 mL of 0.176 M Na3PO4 to 31.4 mL of 0.269 M
A mixture is prepared by adding 26.3 mL of 0.176 M Na3PO4 to 31.4 mL of 0.269 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of…
A mixture is prepared by adding 26.3 mL of 0.176 M Na3PO4 to 31.4 mL of 0.269 M
A mixture is prepared by adding 26.3 mL of 0.176 M Na3PO4 to 31.4 mL of 0.269 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? (b) What will be the concentrations of each of…
A mixture is prepared by adding 28.1 mL of 0.176 M Na3PO4 to 33.6 mL of 0.236 M
A mixture is prepared by adding 28.1 mL of 0.176 M Na3PO4 to 33.6 mL of 0.236 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? .767 g Ca3(PO4)2 (b) What will be the concentr…
A mixture is prepared by adding 28.1 mL of 0.176 M Na3PO4 to 33.6 mL of 0.236 M
A mixture is prepared by adding 28.1 mL of 0.176 M Na3PO4 to 33.6 mL of 0.236 M Ca(NO3)2. (a) What mass of Ca3(PO4)2 will be formed? .767 g Ca3(PO4)2 (b) What will be the concentr…
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