Chemistry question and answers for September 06, 2023
- Q rate of evaporationViscositySolubilitycolor of dilute aqueous solution or pure liquids on litmuspapereffect of aqueous solution or pure liquids on litmus paperreaction with BaCl_2 (aq) or AgNO_3 (aq)solubility in solvents other...
- Q 1. Calculate the volume in milliliters (mL) of a 6.00 MNaOH solution needed to make 5.00 x 102 mL of a 0.100 M NaOHsolution. (Recall that M = molar =...
- Q Discussion about; Losing and gaining weightObesity is a big problem in the industrialized countries.Nutrition facts now have been added to the labels on the fooditems, so people can use them...
- Q Find an example of a detergent. Using a line drawing, draw thedetergent and provide its name.
- Q Why does the nitration of bromobenzene form ortho and paraproducts in an Electrophilic Aromatic Substitution reaction?
- Q Consider a the titration of 0.685 L of 0.773 M ascorbic acid(H2C6H6O6) with 1.76 MNaOH. What is the pH at the second equivalence point of thetitration?
- Q Calculate the percent ionization of arsenous acid(H3AsO3) in solutions of each of thefollowing concentrations (Ka = 5.1e-10.)(a) 0.206 M%(b) 0.556 M%(c) 0.822 M%
- Q A buffer solution contains 0.33 mol of hypoiodous acid (HIO) and0.75 mol of sodium hypoiodite (NaIO) in 4.50 L.The Ka of hypoiodous acid (HIO) is Ka =2.3e-11.(a) What is the...
- Q FIVE CLINICAL CHEMISTRY QUESTIONS:1. What is the origin of AFP in the amniotic fluid? When do AFPlevels peak in amniotic fluid? In maternal circulation? When shouldmaternal blood levels be drawn?2....
- Q Consider the following reaction. It is occuring in a closedsystem and it is currently at equilibrium:2H2O(g)+ Heat ↔ 2H2(g) + O2(g)  Label each of the following statements with is effect on...
- Q Determine the pH of each of the following solutions.(a) 0.637 M hydrosulfuric acid (weak acid with Ka =9.5e-08).(b) 0.764 M hypoiodous acid (weak acid with Ka =2.3e-11).(c) 0.458 M pyridine...
- Q Discuss about advantages and disadvantages of the Haber’s Processin production of ammonia, and how le chalitier principle is used inhaber’s process. Explain in details. mininumum of 3 paragraphsplease.
- Q Plot on the same energy diagram having the vacuum as zero:(A) the absolute electrochemical potentials, under standardconditions, of the following reactions: (i) H+/H2, (ii) O2/H2O (pH= 1). What is the...
- Q Calculate the ratio of the packingfactors for the following cases: 1) simple cubic to face centeredcubic. 2) simple cubic to hypothetical face centered body centeredcubic crystal (i.e. a face centered...
- Q What is the chemical reaction equation when Vermiculite comes incontact with soil?
- Q For the peptide belowThr, Ser, Tyr, Met, Asp, Phe, His, Lys, Trp, Gly, Pro, Arg, Ile,GluCalculate overall charge for pH=5 and pH=11 Calculate overallpI
- Q Diets that severely restrict carbohydrate intake often result inketosis for the dieter.Explain why this occurs by selecting the correct answer.A. When carbohydrates are restricted, the body metabolizes fatsfor energy, resulting...
- Q the decomposition of amonia is shown below. if kp is1.5x103 at 400 C, what is the partial pressure of amoniawhen the partial pressure of H2 is 0.15 atm andN2 is...
- Q A 100.0 −mL buffer solution is 0.110 M in NH3 and 0.125 M inNH4Br.A. If the same volume of thebuffer were 0.260 M in NH3 and 0.395 M in NH4Br,...
- Q Â Â When he received the Nobel Prize in chemistry in1960, Willard Libby gave a lecture about radioactive dating to theking of Sweden and assembled guests in Stockholm.a)Â Â It was suspected...
- Q Why does the primary structure impact all levels of proteinstructure? What is unique about the peptide bond that directlyimpacts protein structure? What intermolecular forces stabilizeprotein structure? Consider protein denaturation, whatenvironmental...
- Q In a buffer solution prepared from 10 mL of 3.0 M benzoic acid(HC6H5CO2) added to 20 mL of a 2.0M sodium benzoate (NaC6H5CO2) anddiluted to a total volume of 200mL-...
- Q In a buffer solution prepared from 10 mL of 3.0 M Pyridine(C5H5N) added to 20 mL of 2.0 M PyridineHydrochloride (C5H5NHCl) and diluted to atotal volume of 200 mL- Calculate...
- Q 1. For KNO3 the heat of solution is 23.8 kJ/mol andthe lattice energy is -685.0 kJ/mol. Calculate the heat ofhydration.2. 60.3 g of zinc sulfate [ZnSO4], is added to 160....
- Q Answer the following and express your answer using twosignificant figures.Calculate the final concentration of each of the followingdiluted solutions.A) 3.5 L of a 4.0 M HNO3 solution is added to...
- Q You prepare a solution by dissolving 50.4g sucrose (C12H22O11) in0.332 kg of water. The final volume of the solution is 355 mL.Calculate the concentration of the solution in each unit.1...
- Q A sample that contains only BaCO3 and MnCO3 weighs 0.8192 g.When it is dissolved in excess acid, 0.2420 g of carbon dioxide isliberated. What percentage of BaCO3 did the sample...
- Q Calculate the mass and volume of 150 mmol ofbenzaldehyde, and the theoretical yields of benzoin, benzil, andbenzilic acid expected from that much benzaldehyde. I'm pretty surethat you use 2 mol...
- Q I don't understand this at all so the more detailed explainationwould be amazing, thanks!part B: How many grams of NH3 canbe produced from 3.34 mol of N2 and excess H2.Express...
- Q Answer the following and express your answer using twosignificant figures. Calculate the grams of solute needed toprepare each of the following solutions.A) 1.6 L of a 4.5 M NaOH solutionB)...
- Q a sample of water collected in the field had a pH of 6.8. by thetime the water sample reached the laboratory for analysis the pHhad increased to 7.5. give a...
- Q 9. Calculate the freezing point and boiling point of thefollowing aqueous solutions, assumingcomplete dissociation:(a) 10.5 g FeCl3 in 1.50
- Q 1. Why is it impossible for greater than 96% pure ethanol to beobtained from fractional distillation of the fermentationmixture?2. In terms of the velocity of light, what is refractiveindex?3. Does...
- Q Titanium metal requires a photon with a minimum energy of 6 .9 4* 1 0 - 1 9 J to emit electrons. ( a ) What is the minimumfrequency of...
- Q WK 11: In the study of oxidation/reduction reactions, what ismeant by \"spectator ions\"? Give an example in a chemicalreaction.
- Q When an ion-selective electrode for X was immersed in 0.0760 MXCl, the measured potential was 0.0450 V. What is the concentrationof X when the potential is 0.0600 V? Assume that...
- Q I DO NOT have a specific question, my question here isGENERALHOW TO DETERMINE IF A COMPOUND IS POLAR OR NONPOLAR?I know how to figure about the number of valence electrons...
- Q An elastic (stretchable) balloon made of a material that ispermeable to water but not to any solutes is filled with an aqueoussolution containing 0.1 M glucose and 0.3 M NaCl....
- Q A 38.40 mg sample of an organic acid composed of just carbon,hydrogen, and oxygen was burned in pure oxygen to give 37.54 mg CO2and 7.684 mg H2O in a combustion...
- Q One method for preparing alcohols involves hydration of alkeneswith aqueous acids (such as sulfuric acid and water). In light ofthis fact, it seems surprising that the phosphoric acid promotesthe elimination...
- Q Hydroxylamine is a weak base that readily forms salts used asantioxidants in soaps. What is the pH of a 0.025M hydroxylaminesolution that has a Kb of 9.1x10ï€9 ?
- Q Calculate the exact masses and relative isotopic abundances ofall the isotopomers of dichloromethane. Consider only the two mostabundant isotopes of carbon and chlorine, and ignore deuterium andtritium (i.e., assume the...
- Q write a detailed arrow pushing mechanism for the lightinitiated monochlorination of ethane
- Q 14.00 g of anhydrous sodium acetate (82.03 g/mol) wasdissolved in 100.00 g of water, the heat capacity of the reactionmixture was 4.045 J/g K. The change in temperature was increased...
- Q A cylinder fitted with a piston has an initial volume of 0.1 m3and contains nitrogen at 150 kPa, 25 0C. The piston is moved,compressing the nitrogen until the pressure is...
- Q Please explain the following, thank you.Why does the amine lone pair bind the protic hydrogen of analcohol more tightly THAN an alcohol lone pair binds the protichydrogen of an amine?
- Q Apply Hume-Rothery Rules to Copper and Tin. Then, apply them tocopper and silver.Atomic Radius of Copper = 128 pmAtomic Radius of Tin = 140 pmAtomic Radius of Silver = 144...
- Q Problem 1. Consider a crystal with HCP structure, having anideal c/a ratio. Complete parts (a)-(c) below.(a) (1.0 pt max) Demonstrate that the ideal c/a ratio equals 26/3.(b)(0.5 pt max) Find...
- Q what's the relationship between polymer structures and relativephysical properties?
- Q consider the following system at equilibrium where delta H = 16.1kj, and Kc = 6.50x10^-3, at 298 K. 2NOBr forwsrd reverse arrows 2NO+ Br2if the VOLUME of the equilibrium system...
- Q A 30.0-mL sample of 0.165 M propanoic acid is titrated with0.300 MKOH.A)Calculate the pH at 0 mL of added base. D)Calculate the pH atthe equivalence point. G)Calculate the pH at...
- Q What is the pH of a solution containing 1.093 mol L-1of a weak acid with pKA = 3.36 and 1.406 molL-1 of another weak acid with pKA = 8.42?You have...
- Q At 1 atm, how much energy is required to heat 85.0 g of H2O(s)at –24.0 °C to H2O(g) at 135.0 °C? Helpful constants can be foundhere.
- Q How many minutes will it take to plate out 16.22 g of aluminummetal from a solution of Al3+ using a current of 12.9amps in an electrolytic cell?60.11348017374.9225
- Q Mass of flask and foil (g) = 63.4842 Mass of flask, foil, andcondesned vapor (g) = 63.6995 Temperature of boiling water bath (C)= 95 degrees C Volume of flask (mL)...
- Q Oxidation-Reduction Titration***Sulfuric acid used was 6 M***All Lab notes are at the bottom, procedure included forclarity... PLEASE HELP WITH THE SHORT ANSWER:)PROCEDURES:Experiment 1: Prepare the MaterialsTake four 100.00 mL volumetric...
- Q Briefly explain Octahedral Crystal Field Splitting.
- Q 11. If 0.0296 L of stock solution are diluted to 3.00L to form0.345 M solution, what is the concentration of the stocksolution?
- Q a rock returned from the surface of the moon has a ratio ofRb87 to stable Sr87 atomos equal to 14.45assuming that this was all Rb87 upon the formation ofthe solar...
- Q Cyanide ion can be determined indirectly via atomic absorptionbased on its ability to dissolve silver while passing through aporous silver membrane, as described by the chemical equation4 Ag(s) + 8...
- Q 1. Aphenomenon called supercooling is frequently encountered in thisexperiment. In supercooling, a solution momentarily drops below itsfreezing point, and then warms up again, before solidificationbegins. What allows supercooling to occur?2.The...
- Q Chemical equations serve a variety of purposes, but the mostgeneral form of a chemical equation is reactants -> products.Most often, reactants and products are described by their chemicalformula, possibly including...
- Q The bond angle in NH3 issignificantly smaller than the ideal bond angle of 109.5° becauseof the lone pair on the central atom. Which best explains why thebond angle in SO2...
- Q Calculate the pH of the solution after the addition of thefollowing amounts of 0.0649 M HNO3 to a 70.0 mL solution of 0.0750M aziridine. The pKa of aziridinium is 8.04.a)...
- Q 56.0 mL of 2.50 M Fe(NO3)2 is combinedwith 25.0 mL of 0.0525 M Na2CO3.Ksp of FeCO3 is 2.1 ×10-11.What mass of FeCO3(s) will be produced? in gramsWhat is the [Fe2+]...
- Q An alkane with the formula C6H14 can be prepared byhydrogenation of either of only two precursor alkenes having theformula C6H12. Write the structure of this alkane, give its IUPACname, and...
- Q How is Avogadro's principle (n1/v1=n2/v2) derived from the idealgas law. Can you show me the algebraic steps?
- Q Using a molecular mechanics program, calculate the energydifference or the difference in heats of formation between Z- andE-stilbene. How do your computed values compare to the differencein heats of hydrogenation...
- Q Nuclear Binding Energya)Calculate the mass defect of the helium nucleus 52He. The massof neutral 52He is given by MHe=5.012225amu. Express your answer inatomic mass units to four significant figures.b)Calculate the...
- Q Find the temperature in ºC at which Kp = 43.7 for the reactionH2(g) + I2(g) ⇌ 2 HI(g). Use ∆Hºrxn and ∆Sºrxn to calculate andassume that they are independent of...
- Q Describe the influences and forces driving the formation of thelipid bilayer. Briefly discuss the effect of a phase transition ona lipid bilayer
- Q If hydrogen sulfide concentrations are greater than 0.15 mg S/L,it is harmful to fish health, calculate the minimum safe pH, if thetotal sulfide concentration is determined to be 20 micrometers.Assume...
- Q A major organic acid in this juice is malic acid, a dicarboxylicacid with molecular weight of 134. You are asked to determine thetotal acidity of this juice and a 10-mL...
- Q A reaction has and △H°298 = 151 kJ/mol and △S°298 = 286 J /mol Kat 298 K. Calculate △G in kJ/mol.
- Q Would you have affected the freezing point of water as much asyou affected the freezing point of benzene? Explain using the Dffor each solvent as part of your explanation.
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