Chemistry question and answers for July 14, 2023
- Q Formal charge for C2H4. Formal charge for C2H2. Formal chargefor HNO3. Show work
- Q ± Common-Ion Effect on Solubility for Lead Thiocyanate Leadthiocyanate, Pb(SCN ) 2 Common-Ion Effect Consider the dissolutionof AB(s) : AB(s)⇌A+(aq)+ B − (aq) Le Châtelier's principle tells usthat an increase...
- Q What information is contained in space group symbol? Whatsymmetry operations are present in P-1 and P21/c space groups?please explain this question as in depth as possible. i think it isrefering...
- Q 1) Consider the combustion of coal(C70H41O6N) with a heat offormation of -300kJ/mol in 20 mol% excess air with main combustionproducts of CO2 , H2O, and NO2.a) Write the balanced form...
- Q Suppose 20.0 mL of a 0.100 M NH3 solution is titrated with 0.100M HI. Determine the pH of the solution after the addition of thefollowing volumes of titrant.a. 5.00 mLb....
- Q Fisher Esterification of m-Nitrobenzoic Acid to produce methylm-nitrobenzoate Lab ReportPurpose Statement:Discussion                                                                                                                                                          (15 points)a. Carbonyl compounds can be divided in two groups. One groupwill consist of acyl halides, anhydrides, carboxylic acids, esters,amides;...
- Q A buffer is prepared by mixing 206 mL of 0.452 M HCl and 0.470 Lof 0.400 M sodium acetate. What is the pH? How many grams of KOHmust be added...
- Q .44 The compressed air tank of a scuba diver reads 3,200 psi atthe beginning of a dive and 825 psi at the end of a dive. Converteach of these values...
- Q When 6.597 grams of a hydrocarbon, CxHy, were burned in acombustion analysis apparatus, 21.74 grams of CO2 and 5.935 gramsof H2O were produced. In a separate experiment, the molar mass...
- Q A.) Identify the one substrate that reacts the fastestwhen treated with hydrochloric acid at room temperature.A.) 5-Chloro-2-methylheptan-2-olB.) 6-Chloro-6-methylheptan-3-olC.) 2-Chloro-2-methylheptan-1-olD.) 2-Chloro-2-methylheptan-3-olB.) identify the one substrate that reacts the fastestwhen treated with...
- Q Cryolite, Na3AlF6(s), an ore used in the production of aluminum,can be synthesized using aluminum oxide. Balance the equation.Al2O3(s) + NaOH(l) + HF(g) ---> Na3AlF6 + H2O(g)If 11.3 kilograms of Al2O3(s),...
- Q Determine the pH of the following solutions8.0×10−2M RbOHand 0.130 M NaCl9.2×10−2M HClO4and 2.6×10−2M KOH0.120 M NaClOand 4.50×10−2M KI
- Q explain how the method of continuous variation might be used todetermine the stoichiometries of a reaction between two strongelectrlytes in solution to form a soluble, nonionized product
- Q Calculate the [H3O+] and pH of the polyprotic H3C6H5O7 with aninitial concentration 0.125 M. I got 0.011, but apparently it iswrong even though I added the three dissociated concentrations.Help would...
- Q 100 m3 of a fuel oil are burned per hour with 20 percent excessair in a steam generator. The fuel oil has a density of 926 kg/m3and the following mass...
- Q In the Deacon process for the manufacture of chlorine, HCl andO2 react to form Cl2 and H2O. Sufficient air (21 mole % O2, 79% N2)is fed to provide 35.0% excess...
- Q Describe the chromatofocusing process including a) how separationis enacted b) what pH conditions you need and why c) someapplications of this technology d) contrast this with IMAC e) whatapplications might...
- Q Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2is 4.6 * 10-4.1.821.672.670.30
- Q The following reaction was monitored as a function of time:A→B+C A plot of ln[A] versus time yields a straight line with slope−4.0×10−3 /s .Part D If the initial concentration of...
- Q How many moles of Al2(SO4)3 are there in 10.26 g ofAl2(SO4)3?
- Q A mixture of propane and butane is burned with pure oxygen. Thecombustion products contain 46.7 mole% H2O. After allthe water is removed from the products, the residual gas contains68.8 mole%...
- Q Glucose (C6H12O6) is the primary source of metabolic energy forvertebrates.a)Determine the amount of available glucose in 500g ofsucroseb)Write a balanced chemical reaction for the combustion ofglucose. The products of the...
- Q A rechargeable battery is constructed based on a concentrationcell constructed of two Ag/Ag+half-cells. The volume of eachhalf-cell is 1.9 L and the concentrations of Ag+ in the half-cellsare 1.15 M...
- Q Determine the pH of each of the followingsolutions.A) 2.00×10−2 M HClO4B) 0.120 M HClO2C) 3.5×10−2 M Sr(OH)2D) 8.60×10−2 M KCNE) 0.150 M NH4Cl
- Q Describe another method other than filtering to separate a solidfrom a liquid. Compare and contrast this method with filtering.
- Q If I have 2 samples of limestone, sample 1 weighing 0.732g andsample 2 weighing 0.825g. Both were dissolve do in15ml of 3.00M ofHCL. 1.5g of (NH4)2SO4 was added to each...
- Q If a solution containing 35.10 g of mercury(II) chlorate isallowed to react completely with a solution containing 6.256 g ofsodium sulfide, how many grams of solid precipitate will be formed?How...
- Q 1)Mercury (II) hydroxide is quiteinsoluble in water (Ksp of Hg(OH)2 =3.0×10-26 at 25°C.In which one of the followingsolutions would you expect Hg(OH)2 to be even lesssoluble than it is in...
- Q using wedge-dash notation to designate stereochemistry, draw(R)-pentane-1,2-diol
- Q Consider the titration of 50.0 mL of 0.5 M weak acid analyte HF(Ka = 6.6 x 10-4) with 1.0 M titrant NaOH. A. (5 pts) What is thevolume of base...
- Q Calculate the pH for an aqueous solution of pyridine thatcontains 2.15 × 10-4 M hydroxide ion.
- Q Calculate the pH of a solution that contains the followinganalytical concentrations 0.0100 M inH2C2O4 and 0.0610 M inNa2C2o4. Please show steps so that we can learn from this?
- Q The mechanism for the Fischer esterification is shown on page762 of your textbook. The acid catalyst is specifically used intwosteps – protonation of 10 to make 11 and in the...
- Q Starch+Iodine are reacted to produce a Starch-Iodinecomplex. 10mL were then placed in 2 test tubes. test tube one washeated to 80 degrees Celsius, and the result was a color change...
- Q Consider the following Measurment techniques:Infrared SpectroscopyUltraviolet SpectroscopyMicrowave SpectroscopyMass SpectrometryX-ray crystallographyNuclear Magnetic ResonanceAtomic Absorption SpectroscopyFor each measurment technique, What specific property of amolecule are you learning about and what are you...
- Q Differentiate between heat treatment processb and cold workingprocess?
- Q Your acid has a pka of 6.45 and a concentration of 0.079M. Youare given 40.8mL of this acid, what is the pH of this initialsolution? Calculate the pH of the...
- Q a) You have to prepare a pH 5.25 buffer from the following 0.100M solutions available:1. hydrocyanic acid2. hypobromous acid3. propanoic acid4. potassium cyanide5. potassium hypobromite6. potassium propanoateWhich solutions would you...
- Q The dissociation of hydroxylamine H2NOH in water Kb = 1.5x10-8forms what two products. (Show ICE Table).You have a 0.340 M solution of the base above. You create an ICEtable and...
- Q A 25.00 mL aliquot of a 0.100 M maleic acid, HOOC-CH=CH-COOH(pK1=1.87) and (pK2 = 6.23) was titrated with 0.1000 M NaOH.Construct a titration curve by calculating pH at a) initial...
- Q Given the following equation: Na2O + H2O ---> 2NaOH. How manygrams of NaOH is produced from 1.20 x 10^2 grams of Na2O?
- Q ch4 + 4br2 ---> CBr4 + 4HBr The process is bromination, butthe method doesn't make sense. Pls help.
- Q Use the Table of Thermodynamic Data to decide which of thefollowing reactions have K>1 at 298 K:HCl(g)+NH3(g) <=> NH4Cl(s)2 Al2O3(s) + 3 Si(s)<=>  3 SiO2(s) + 4 Al(s)Fe(s) +...
- Q The Kp for the production of phosgene is 18.0. If one mole eachof CO and Cl2 are mixed at the total pressure of 1 atm, what willbe the partial pressure...
- Q List and briefly describe the errors that may occur with pHmeasurement
- Q classify the substances as eithermetal, nonmetals,semi metals, ionic, covalent, ormixture.Copper wire, Plastic, Sodium Carbonate, Aluminum Foil, Wood,Glass, Silver Wire, Graphite, Potassium Chloride, Lead, Silicon,Potassium accetate (solid), Potassium accetate (liquid), Dime,Sulfur,...
- Q A professor titrated 0.47 g of an unknown monoprotic weak acidwith 0.0973 M NaOH.The titration data is below.a) Calculate # of moles of NaOH required to reach theequivalence point (endpoint).b)...
- Q A student gets the following data for the heat of neutralizationtrials using 1.0 M NaOH and 1.0 M HCl.A. Mass of calorimeter /g trial1:43.5B. Mass HCl and calorimeter / g...
- Q Your acid has a pka of 7.54 and a concentration of 0.084M.      You are given 38.6mL ofthis acid, what is the pH of this initial solution?      Calculate the pH of...
- Q The equilibrium constant Kc is 1.6 ×105 at 1297 K and 3.5 × 104 at 1495 K for thereactionH2(g) + Br2(g) ⇌ 2HBr(g)a. Is ΔrH° for this reaction positive ornegative?b....
- Q What does each of the following look like when mixing eachcompound with water:a) an insoluble ionic compoundb) an insoluble molecular compoundc) a soluble ionic compoundd) a soluble molecular compound
- Q a. Draw figures over-viewing the apparatus/procedure for (a)vacuum filtration and (b) hot gravity filtration, two techniquesused in this protocol. Briefly explain why the two methods are usedin the specific steps...
- Q Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4,a salt of gold. This is the balanced equation ;2Au+2BrF3+2Kf=Br2+2KAuF4(a) Assign oxidation numbers to each Au and Br atom...
- Q Draw the Lewis structure for AsF3Draw the Lewis dot structure. To change the symbol of an atom,double-click on the atom and enter the letter of the new atom.Draw the Lewis...
- Q 1) Determine the number of moles of Br2 in a sample consistingof:8.02×1022 Br2 molecules2.23×1024 Br atoms11.0 kg bromineDetermine the mass percent H in the hydrocarbon isopentane,CH3CH(CH3)CH2CH3?Determine the empirical formula of:benzo[a]pyrene,...
- Q 4. Acid-base reaction is a neutralization reaction. If 12.50 mLof 1.20 M NaOH solution is used to neutralize 45.25 mL ofHNO3 solution, calculate the concentration of the original HNO3solution.  (A)....
- Q Part AA 50.0-mL sample of 0.200 M sodium hydroxide istitrated with 0.200 M nitric acid.Calculate the pH of the solution, after you add a total of 51.9mL 0.200 M HNO3.Express...
- Q Answer all parts as fully as you can, just as if it were a realexam(a) State the First Law of Thermodynamics(b) Explain the difference between heat and work(c) Explain why...
- Q Calculate the enthalpy of combustion of methane gas at 1000K and1atm.
- Q Watch the animation and select the interactions that can beexplained by hydrogen bonding. Check all that apply. Check all thatapply. HF has a higher boiling point than HCl. HF is...
- Q Give 3 examples of ionization methods that find use in molecularmass spectrometry; compare and contrast with respect to ease ofuse, hard vs soft ionization, application and cost
- Q What is the function of water in a steam distillation of thespice oil from the ground spices? What determines the distillationtemperature of the distillate in a steam distillation and why...
- Q #14.60 Consider the followingreaction: CO(g)+H2O(g)⇌CO2(g)+H2(g) Kp=0.0611 at 2000 K A reactionmixture initially contains a CO partial pressure of 1332 torrand a H2O partial pressure of1756 torr at 2000 K.1) Calculate...
- Q How do I determine Loss or gain of electrons for the followingelements : Sodium, Nitrogen, Aluminum, Chlorine, Calcium andOxygen
- Q Determine the specific enthalpy of fusion of water. Mass ofCalrimeter is 3.492g, Mass os water is 43.552g. Mass of Ice is29.276g. Initial water temp is 24 degrees C. Initial Ice...
- Q Calculate the ratio of the energy released by the completefission of 1.0 kg of Uranium-235 to the energy released by burning1.0 kg of methane, CH4. You can use the fact...
- Q 1. In this experiment we injected the sample to be analyzed byGas Chromatograph equipped with an FID (Flame Ionization Detector).The detector ionizes the sample as it reaches it, and the...
- Q Scenario: You are an engineer supervising the work on abrownfield remediation project. Just before the close of business,as you are grabbing your coat, you notice one of your coworkersleft some...
- Q Calculate the pH of each of the solutions and the change in pHto 0.01 pH units caused by adding 10.0 mL of 3.35-M HCl to 550. mLof each of the...
- Q Question 14One of the steps in the commercial process for convertingammonia to nitric acid is the conversion of NH3 to NO:4NH3(g)+5O2(g)→4NO(g)+6H2O(g)In a certain experiment, 2.10 g of NH3 reacts with...
- Q Consider how to prepare a buffer solution with pH =7.33 (using one of the weak acid/conjugate basesystems shown here) by combining 1.00 L of a0.418-M solution of weak acid with0.359...
- Q a) In the double displacement reaction between chromium (III)nitrate and ammonium carbonate, the molecular formula of chromium(III) nitrate is____ , the molecular formula of ammonium carbonateis_____ , the molecular formula...
- Q Draw a glycerophospholipd containing the following:a) A C12 saturated fatty acidb) A C12 omega 4-cis unsaturated fatty acidc) serine
- Q For the reaction shown, compute the theoretical yield of theproduct in grams for each of the following initial amounts ofreactants.2Al(s)+3Cl2(g)→2AlCl3(s)A) 1.0 g Al; 1.0 g Cl2B) 5.5 g Al; 19.8...
- Q C) What additional volume of 10.0 M HCl would be needed toexhaust the remaining capacity of the buffer after the reactiondescribed in Part B? THE CORRECT ANSWER IS 1.8 ML...
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