Chemistry question and answers for August 22, 2023
- Q I need to come up with a a separation and purification schemeprocedure for 50% benzoic acid, 40% benzoin, and 1,4-dibromobenzenehaving the following reagents available: 1M NaOH, 6M NaOH, 1M HCl,6M...
- Q Calculate [H30] for the following solutions. a) 6.16 x 10 ^-3 MHBr b) 1.80 x 10^-2 M KOH
- Q The specific rotation of optically pure (2S,3S)-tartaric acid is-12°. The optical rotation of an impure sample containing a mixtureof enantiomers of this compound was measured to be -9°. In theboxes...
- Q A shelf containing several chemicals, Salicylic acid,4-(4-Hydroxyphenyl)butan-2-one (a.k.a. Raspberry Ketone) and4-methylaniline, fell and the vials shattered. The white powdersare hopelessly mixed in a dustpan. You are promised a raise if...
- Q You want to maintain pH = 7.0 for an enzyme-catalyzed reactionthat will produce hydrogen ions along with the desired product. Atequal concentrations, which weak acid, if any, will serve as...
- Q For triatomic molecules (i.e., molecules that contain threeatoms) such as difluorine monoxide, F2O, there are only twopossible molecular geometries, linear or bent.a. Draw the Lewis structure for F2O (O is...
- Q For each reaction listed, determine its standard cell potential(in V) at 25°C and whether the reaction is spontaneous at standardconditions.(a)Co2+(aq) + Mg(s) → Co(s) +Mg2+(aq)ΔE° = V(b)2 Al(s) + 3...
- Q Acetone and Ethanol have similar molar masses but significantlydifferent delta T values. Explain this based on theirintermolecular forces. The delta T values calculated were -13 forEthanol and -22 for Acetone.
- Q Please calculate the adiabatic flame temperature formethanol combustion for the following case : 12% CH3OH (g) in airat 1 atm when the maximum possible conversion of methanol isachieved. It is...
- Q a) Show the full balanced equation of Benzaldehyde + SodiumCyanide -> Benzoin. Stoichiometry ratio should be 2:1. Ratio of-CN to benzoic is 1:1 if that even helps. Rely on Sodium...
- Q Explain how the determination of the rate law equationsignificantly differs from the determination of the equilibriumconstant Keq expression.
- Q 1.) Part A. Write the two general rules that govern the use ofthe VESPR model.Part B. Write the four guidelines (rules) for applying the VESPRmodel to all types of molecules.
- Q Solve an equilibrium problem (using an ICE table) to calculatethe pH of each of the following solutions.0.16 M CH3NH3Cla mixture that is 0.16 M in CH3NH2and 0.16 M in CH3NH3Cl
- Q The following reaction was performed in a sealed vessel at 724*C:H2(g)+I2(g)?2HI(g)Initially, only H2 and I2 were present at concentrations of[H2]=3.85M and [I2]=2.85M. The equilibrium concentration of I2 is0.0800M . What...
- Q A solution contains naphthalene (C10H8)dissolved in hexane(C6H14) at a concentration of 12.84 % naphthalene by mass.Calculate the vapor pressure at 25 ∘C of hexane above the solution.The vapor pressure of...
- Q 2.) Describe and show your calculations how you will make a 50mL solution of an ammonia buffer where pH = 10.07 and [NH3] +[NH4+] = [NH4]T = 10.2 M using...
- Q calculate Ecell foreach of the following cells.Al(s)|Al3+( 0.20M )||Fe2+( 0.90M)|Fe(s)Ag(s)|Ag+( 0.38M )||Cl-( 0.094M)|Cl2(g, 0.60atm )|Pt(s)
- Q What fraction of 1,6-hexanedoic acid (adipic acid) isin each form (H2A, HA−, A2−) at pH 5.00?
- Q 1. A solution of AgNO3 contains 30 g/liter. What volume of thissolution is needed toreact with 0.60 g of 65% pure AlCl3?
- Q How much energy, in kiloJoules, would be required to raise thetemperature of 1.00 kilogram of liquid benzene(C6H6) from 20.0 dC to its boling point of80.1dC and then to completely vaporize...
- Q 1. At 25°C, 298.25 mL of anaqueous solution of NiCl2 with a molar analytical concentration of0.00004873 M is added to 487.37 mL of an aqueous solution ofAlBr3with a molar analytical...
- Q Consider the following dilution steps from a 3.51 M stocksolution of H2SO4. 1. 25. mL of the 3.51 M stock solution isdiluted to 150. mL to make soln2. 2. 35....
- Q (a) Find ∆G◦ and K at 298.15 K for the gas-phase reaction2 SO2(g) + O2(g) 2 SO3(g)(b) If a stoichiometric mixture of SO2 and O2 is allowed to cometo equilibrium...
- Q Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogensulfide, H2S, through the reactionNH4HS(s)⇌NH3(g)+H2S(g)This reaction has a Kp value of 0.120 at 25 ∘C.An empty 5.00-Lflask is charged with 0.350 g of...
- Q 3. How many grams of oxygen are collected in a reaction where235ml of oxygen gas is collected over water at temp of 25 C and atotal pressure of 697 torr4....
- Q An analytical chemist is titrating 178.3mL of a 0.3400M solutionof acetic acid HCH3CO2 with a 0.2300M solution of NaOH . The pKa ofacetic acid is 4.70 . Calculate the pH...
- Q Find one example of a Maillard reaction. Describe what happensduring the reaction. Where are the ingredients required comingfrom? What conditions are required? What is the effectproduced?
- Q for the lab ofSPECTROPHOTOMETRIC DETERMINATION OF IRON USING 1,10PHENANTHROLINE%Fe= c unknown(mol/L) X 1L X 80 X Molarmass Fe(g/mol)Â Â X100%Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Mass of Sample (g)I am confused about how to find the concentration...
- Q 6. Provide a reaction to identify aldehydes and ketones,followed by at least two important reactions to differentiatealdehydes and ketones with examples and explain their reactionmechanism
- Q (Struc&prop of Mat)If homogeneous nucleation occurs at 900°C in copper(Tmp=1085°C)a. Calculate the critical radius size given that the latent heatof fusion is –1.77 × 109 J/m3 and surface free energy...
- Q With names and structures, enzyme name, intermediate names,cofactor name (but not their structure) describe the anapleroticreaction of the Krebs cycle. Describe the regulation of the enzyme,and the rationale behind this...
- Q What is an atomic element?
- Q d) What components do proteins bring to the browning processthat aren’t available during simple caramelization of acarbohydrate?
- Q Does the Maillard reaction create any compounds that causehealth concerns? If so, what kind of compounds raise what sort ofconcerns?
- Q 1) Calculate the change internalenergy (Delta E) for a system that is giving off 32.6 kJ of heatand surroundings are performing 975 J of work on the system.2) Calculate the...
- Q Acooling process at constant pressure involves the removal of 3.5 kWfrom the system. Compute the mass flow rate required and the changein entropy of the following substances: (a) air decreasing...
- Q (a) What is the magnitude of the angular momentum for an ? = 30electron?? J
- Q (a) What are [H3O+], [OH -],and pOH in a solution with a pH of 2.49?[H3O].......................POH.........................PH.............................(b) What are [H3O+], [OH -],and pH in a solution with a pOH of 5.99?[H3O]....................POH......................PH.........................
- Q PLEASE SHOW ALL WORK AND STEPSWhat is the pH of a solution that contains 0.050 Macetic acid, HC2H3O2 (Ka=1.8 x 10^-5), and 0.05 M hydrocyanic acidHCN (Ka = 4.9 x...
- Q What are the antibiotic resistant genes for doxycycline? Ifpossible, give the gene sequence.
- Q At equilibrium, the concentrations in this system were found tobe [N2]=[O2]=0.100 M and [NO]=0.500 M.N2(g) + O2 (g) <----> 2NO(g)If more NO is added, bringing its concentration to 0.800 M,...
- Q 3H2(g)+N2(g)?2NH3(g)How many grams of NH3 can beproduced from 3.23mol of N2 and excess H2.How many grams of H2 are needed to produce 13.85g of NH3?How many molecules (not moles) of...
- Q Part A) Electrolysis is performed on a mixture of CuBr(l),AgBr(l), MgBr2(l), and NiBr2(l). Which of the following is producedat the cathode?A) Cu(s)B) Ag(s)C) Mg(s)D) Ni(s)Part B)You are given some ferrous...
- Q 1) what class of organic compunds does the carbon-containingreactant in the reaction above belong to CH3+CH2+CH2+(C=O) +CH3 +H2arrows both ways H+? There is a bond in between C and O...
- Q CHAPTER 6 Multiphase Systems(Elementary princilples of ChemicalEngineering 4th Ed)6.88) Serine (Ser, molecular weight=105.1g/mol) is anon-essential amino acid (seeFootnote16) produced by fermentation.As with many other fermentation products, substantial downstreamprocessing is required...
- Q At 365 K, pure toluene and hexane have vapor pressures of5.82*104 Pa and 1.99*105 Pa,respectively.a. Calculate the mole fraction of hexane in the liquid mixturethat boils at 365 K at...
- Q (a) Consider the following two stage process:                       Stage 1. The system absorbs 83 J of heat and during this process ithad 44 J of work done on it.                       Stage 2. The system...
- Q A certain weak base has a Kb of 7.60 × 10-7. What concentrationof this base will produce a pH of 10.27?
- Q What are the sources of interference in AAS? What methods areused to minimise these interferences?
- Q SO3(g) + NO(g) NO2(g) + SO2(g) Kc was found to be 0.500 at acertain temperature. A reaction mixture is prepared in which 0.375mol NO2 and 0.375 mol of SO2 are...
- Q Suppose a solution contains 0.22 M Pb2 and 0.49 M Al3 .Calculate the pH range that would allow Al(OH)3 to precipitate butnot Pb(OH)2. The Ksp values for Al(OH)3 and Pb(OH)2...
- Q Calculate the amount of ATP in kg that is turned over by aresting human every 24 hours. Assume that a typical human contains~50g of ATP (Mr 505) and consumes ~8000...
- Q 1) What alkene(s) will be produced when each of thefollowing alcohols is dehydrated?Cyclohexanol2-methylcyclopentanol3-methylcyclopentanol2,3-dimethyl-2-butanol2) Illustrate the mechanism for the acid-catalyzeddehydration of cyclohexanol.3) Illustrate the mechanism for the acid-catalyzeddehydration of 2-methylcyclohexanol. How...
- Q 1) What alkene(s) will be produced when each of thefollowing alcohols is dehydrated?2- propanol2- butanol2) Why is phosphoric acid preferred over sulfuric acidfor dehydration of alcohols?3) What measures should be...
- Q )? How would you electroplate a brass object with silver?What is EPNS?How could you use electrodeposition to measure the purity of asample of copper sulfate?How is this process used industrially...
- Q 1) What alkene(s) will be produced when each of thefollowing alcohols is dehydrated?Cyclopentanol2-methyl-2-butanol2) What is the purpose of adding 2% sodium carbonatesolution to the distillate in Experiment A?3) If 8.0...
- Q Use the Henderson-Hasselbach equation to calculate the pH ofeach solution:I figured out part A by myself because the numbers were alreadyin Molarity for me so I just plugged in numbers...
- Q Aluminum is a reactive metal. It reacts with oxygen to formaluminum oxide as shown below.4 Al(s) + 3 O (g) → 2 Al O (s)I. When one mole of aluminum...
- Q Description A large percentage of drugs (>60%) are based onnatural products that have been isolated from nature. For thisassignment, pick a drug that is a natural product or is based...
- Q How much heat is required to convert 74 grams of ice at -4 Cinto 74 grams of water at 52 c
- Q A titration experiment is done with 1.37E-2 MNaOH to determine the acid concentration in 0.631L of an unknown acidic solution. It was found that to reach theequivalence point 12.3 mL...
- Q The role of catalysts is critical in many chemical reactions.They have great consequence in the fields of medicine andpharmacology. On the basis of your research, respond to thefollowing: Identify the...
- Q Acid deposition is the transfer of acids in the atmosphere toEarth\'s surface through precipitation, fog, and aerosols. Thepresence of air pollutants, such as sulfur oxides (SOx) andnitrogen oxides (NOx), has...
- Q How many milliliters of 0.500 M KOH should be added to 2.38 g ofoxalic acid (molecular weight: 90.03, pKa1=1.46; pKa2=4.40) to givea pH of 4.50 when diluted to 250 mL?
- Q 1. The pressure of 5.85 L of an ideal gas in a flexiblecontainer is decreased to one-third of its original pressure, andits absolute temperature is decreased by one-half. What is...
- Q What is the difference between the Normal Hydrogen Electrode(NHE) and the Reversible Hydrogen Electrode (RHE)?- Also, if a redox happens at the NHE of 0.2 V, please calculatethe potential for...
- Q Why would the actual coefficients of a ferrousammonium sulfate hexahydrate and the potassium iron oxalate complexin a balanced chemical equation describing the overall process notbe required to compute the predicted...
- Q Sulfate (SO4^2-) concentration is 10 mg SO4^2-/L andmonohydrogen sulfide (HS-) concentration is 2 mg HS-/L. What is thetotal inorganic sulfur concentration in mg S/L?
- Q Predict whether aqueous solutions of the following compoundsare acidic, basic, or neutral.(a)Ba(C2H3O2)2(b) NaNO3(c) Na2SO4(d) NaCl(e) Fe(ClO4)3(f) AlBr3
- Q The vapor pressure of liquid methanol, CH3OH, is 100 mm Hg at294 K. A 5.59×10-2 g sample of liquid CH3OH is placed in a closed,evacuated 490 mL container at a...
- Q Consider the titration of 30.0 mL of 0.0700 M(CH3)3N (a weak base; Kb =6.40e-05) with 0.100 M HCl. Calculate the pH after the followingvolumes of titrant have been added:(a) 0.0...
- Q 1.In today experiment you willperform the aldol condensation between benzaldehyde (PhCHO) andacetone to synthesize dibenzalacetone. Answer the followingquestions regarding this reaction:a.This reaction is an example of amixed aldol condensation. Why...
- Q Calculate [OH -] and pH for each of the followingsolutions.(a) 0.0034 M RbOH[OH-] =_________ MpH = _________(b) 0.0872 g of KOH in 510.0 mL of solution[OH -] =__________ MpH =...
- Q Zn is to be recovered from an ore containing ZnS. The ore isfirst roasted with oxygen to produce ZnO, which is leached withaqueous H2SO4 to produce water - soluble ZnSO4...
- Q initial temperature = 24.3 degree celcuisfinal temperature = 35.7 degree celcuis50.0 ml of 0.740 M phospheric acid +50.0ml of 2.00M of sodiumhydroxidechange in temperature = 11.4 degree celciuscalculate the following1-...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!