Chemistry question and answers for August 30, 2023
- Q State the reason why Rutherford's Model of the atom failed todescribe the observed behaviour of mattercanu add pictures and words
- Q For this assignment, the target compound that you shouldsynthesize is benzyl methyl ether. This is asubstitution reaction. Examine the product and determine whichbonds may be formed. Keep in mind thesubstitution...
- Q Which statements regarding combustion analysis to determinepercent composition are not correct?     I. The mass of oxygen in the samplecompound can be determined from the mass of carbon dioxide that isproduced.     ...
- Q For the reaction Ti(s)+2F2(g)→TiF4(s) compute the theoreticalyield of the product (in grams) for each of the following initialamounts of reactants. a)6.0 g Ti, 6.0 g F2 (express answer to twosig...
- Q Consider the reaction, N2(g) + 3 H2(g) → 2 NH3(g). Suppose 56 gof N2(g) reacts with 18 g of H2(g).d. What is the limiting reactant?e. When the reaction is complete,...
- Q Calculate ?G?rxn and K for each of thefollowing reactions.Part AThe reaction of Cr2+(aq) withCr2O2?7(aq) in acid solution to formCr3+(aq).Calculate ?G?rxn.Part BCalculate K.Express your answer using two significant figures.Part CThe reaction...
- Q Calculate , using the equipartition theorem, the constant-volumeheat capacity of CO_2 in three cases:a.) no vibrations active (the low-T limit)b.) all vibrations active (the high-T limit)c.) with just the lowest-energy...
- Q Based
- Q Carbon dioxide makes up approximately 0.04% of Earth'satmosphere. If you collect a 2.5 L sample from the atmosphere atsea level (1.00 atm) on a warm day (27 ∘C), how many...
- Q Imagine an isolated, 10-liter cylinder containing one mole ofideal gas held in the left five liters of the cylinder by a piston,initially locked in place. The right half of the...
- Q calculate the pHof 0.01 M HF acid.
- Q Classify each compound as an acid, salt, base, oxide, binarymolecular, or organic.AlF3Â 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 9.CCl4Â 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 17.NO2Â Â Â Â Â Â Â Â HNO3Â 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 10.H2SO4Â 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 18. NH4ClNaNO3Â 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 11.CuCl2Â 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 19. C3H7OHN2O2Â 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 12.NH4ClO3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 20. NH3Ca(OH)2Â 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 13.Sn(OH)4Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 21. CH3CH2CH2CH3CH4Â 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 14.ClO2Â 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 22. H2ONH4OHÂ 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 15.Na2OÂ 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 23. (NH4)2OFe2O3Â 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 16.SiO2Â 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 24. HC2H3O2
- Q define polymers and how are they synthesized
- Q Whyshould you always handle the crucible and its cover with thongs.?How will the results be affected if you handle the crucible andcover with your fingers? Discuss the change in the...
- Q Dimethylamine, (CH3)2NH, is an organic base with pKb= 3.23at 298K. In an experiment, a 40.0 mL sample of 0.105mol/L-1(CH3)2NH(aq)istitrated with 0.150mol/L-11HI(aq)at 298 K.(a) Write a balanced chemical equation for the...
- Q Describe the preparation of 1L of a 0.1 M phosphate buffer at pH8.0. The pKa for the buffer is 6.86
- Q A compound has carboxyl group, an aminium group, and aguanidinium group. The pKas of the groups are 3.6, 9.7,and 12.8, respectively. A biochemist has 100 mL of a 0.10 Msolution...
- Q Quantitiy of limiting reagent= 13.5 mmols salicylic acidBased on the quantity of the limiting reactant used above, whatis the theoretical yield of the aspirin (acetalsalicylic acid)product, in grams?
- Q write the steps of fluid catalytic cracking,Using the keyboard,please
- Q The following multipart question involves many electron atomsand their emission spectra.a. What term symbols can arise from the[He]2s22p13d1 excitedconfiguration of carbon (include the multiplicity and the Jlevel)?b. What is the...
- Q I performed an electrophilic aromatic substitution- iodinationof salicylamide.I used 1.012 g of solid salicylamide in 20 mL ethanol. 1.205 gof sodium iodide was also added. Then I placed the solution...
- Q Can you make a seperation scheme for thisTetraphenylcyclopentadienone lab ? Please use the procedure belowto make it. Thank you.Procedure:Add 1.5 g benzil, 1.5 g dibenzyl ketone, and 12 mL absoluteethanol...
- Q What is the freezing point of a 50% by volume ethanol solution?Assume water is the solvent. (Use data from Table 12.7 in thetextbook.)SolventNormal Freezing Point (°C)Kf (°C m−1)Normal Boiling Point...
- Q You have completed a reaction and take the melting point of yourresulting solid product and the melting point you measured on themelt-temp is 130 – 142°C. The product you were...
- Q Bromination of trans-stilbene1. Describe what problems can occur if a reaction is refluxingtoo fast or slow.2. Why is this reaction considered “green†chemistry? How isthis different from a “non-green†bromination....
- Q At 25 ∘C the reaction from Part A has a composition as shown inthe table below.SubstancePressure(atm)C2H2(g)4.15H2(g)4.25C2H6(g)4.25×10−2What is the free energy change, ΔG, in kilojoules forthe reaction under these conditions?Express your...
- Q Step by StepGiven the following analysis of ground water:Ca2+Â Â Â 43.12mg/LÂ Â Â Â Â Â Â Â Â SO42-Â Â Â Â 13.22 mg/LNa+Â Â Â Â 87.15mg/LÂ Â Â Â Â Â Â Â Â Cl-Â Â Â Â Â Â Â Â 123.89 mg/LK+Â Â Â Â Â Â 3.22mg/LÂ Â Â Â Â Â Â Â Â Â HCO3-Â Â 213.7 mg/LMg2+Â Â 15.22mg/LÂ Â Â Â Â Â Â Â Â NO3-Â Â Â Â 3.23mg/LÂ Â Fe2+ 2.13mg/LÂ Â Â Â Â Â Â Â Â Â Â pHÂ Â Â Â Â Â 8.3(A)Â Â Convert all values to meq/L.(B)Â Â Â Do an anion-cation balance.(C)Â Â ...
- Q 50mL of 0.010M NaOH were titrated with 0.50M HCl, added with adropper pipet. If each drop has a volume of 0.040mL, calculate howmany drops of HCl are needed to reach...
- Q Calculate the mass of methane that must be burned to provideenough heat to convert 300.0 g of water at 30.0°C into steam at106.0°C.
- Q a.) Proteins A and B with molecular weight of 16,500 and 35,400move 4.60 cm and 1.30 cm respectively, during electrophoresis andin SDS-polyacrylamide gel. What is the molecular weight of proteinC...
- Q The vaporization of compound A is described by the givenchemical equation.A(l)⟶A(g)ΔHvap∘=42.69 kJ/molCalculate the entropy of vaporization, ΔSvap , for A(l) at 25.0°C given that the boiling point of A is...
- Q Balance the following equation in acidic solution using thelowest possible integers and give the coefficient of water. Cl2(aq)+ S2O32- (aq) → Cl-(aq) + SO42-(aq)
- Q 34.62 g of ferrous bromide reacts with 29.25 g of potassiumchloride in a heated vessel. Write a balanced chemical equation forthis double replacement reaction.  What is the percentyield of ferrous chloride...
- Q Calculate the pH Values of the following two solutions 1.3 x10^-3 MHCl solution and 1.3 x 10^-3 M lactic acid solution in 0.001 MSodium lactate salt.Both have the same value...
- Q use dimensional analysis to solve the following:a) 789mmHg to atmb)4.11 tons to Kgc)6.87 quart to ml2) A mixture is found to contain 3.17g of SiO2(sand), 6.01g ofcellulose, and 7.32 g...
- Q The binding energy per nucleon for magnesium-27 is1.326*10-12 J/nucleon. Calculate the atomic mass ofmagnesium-27, in amu. You may assume that the mass of a nucleon is1.008 amu. (1 kg =...
- Q The stopcock connecting a 1.00 L bulb containing helium gas at apressure of 554 torr, and a 1.00 L bulb containing krypton gas at apressure of 504 torr, is opened...
- Q Based off these compounds, which one is the most hazardous andwhy?Methyl BenzoateAcetanilideNitric Acid (70%)Acetic acidSulfuric Acid (98%)
- Q Consider an amphoteric hydroxide, M(OH)2(s), where M is ageneric metal. M(0H)2 yields M+2OH M(OH)2 +2OH yields (M(OH4)2-Ksp=3x10^-16 Kf= .05 Estimate the solubility of M(OH)2 in asolution buffered at pH =...
- Q How could you distinguish between the following pairs usinghydrogen NMR?cyclohexane and benzenebutane and 2-methylpropanebutyne and 1,3-dimethylbutaneethanol and dimethyl etherHow could you distinguish between the pairs of compounds inquestion 1 using...
- Q Consider the titration of 50.0 mL of 0.0500 MC2H5NH2 (a weak base;Kb = 0.000640) with 0.100 M HIO4. Calculatethe pH after the following volumes of titrant have beenadded:(a) 0.0 mLpH...
- Q What is the reaction A(g) + B(g)+ C(g)------------> D(g) Experiment Initial [A] (mol/L) Initial[B] (mol/L) Initial [C] (mol/L) Initial rate (M/s) 1 0.0500 0.05000.0100 6.25*^(-3) 2 0.1000 0.0500 0.0100 1.25*^(-2)...
- Q Spell your name using capital letters. If there are letters in yourname that do not code for an AAs, replace them by P, H, and W.Shorten or lengthen the name...
- Q The reversible chemical reactionA+B?C+Dhas the following equilibrium constant:Kc=[C][D][A][B]=3.4Part AInitially, only A and B are present, each at 2.00 M.What is the final concentration of A once equilibrium isreached?Part BWhat is...
- Q Draw structural formulas for all possible isomers having thefollowing molecular formulas:a. C4H10b. C2HBr3c. C3H6Od. C3H4Please explain also if you can. Thanks!
- Q A sample of a substance with the empirical formula XBr2 weighs0.5210 g. When it is dissolved in water and all its bromine isconverted to insoluble AgBr by addition of an...
- Q what makes a sample ideal for high performance liquidchromatography?
- Q 3.00 g of potassium hydroxide (KOH) pellets are put into aconstant-pressure calorimeter containing 250 mL of water. Theinitial temperature of the water is 22.3°C. The mixture is thenstirred until all...
- Q Is the six-membered ring system in benzene particularly stableor unstable? Explain using chemical concepts
- Q Cyclic voltammograms for a Fe(CN)63-solution are obtained when the solution is stirred and when it isunstirred. Explain why the stirred cyclic voltammogram looksdifferent from the unstirred one. Why is the...
- Q A beaker with 105 mL of an acetic acid buffer with a pH of 5.000is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is...
- Q How will I find the pI for a non-ionizable amino acid?
- Q Calculate the change in standard-state entropy for the followingreaction that results in the formation of glucose:6 CO2(g) +6 H2O(l) ⟶ 1 C6H12O6(s) + 6O2(g)(If applicable, coefficients of one have been...
- Q The Separation of Three Organic Compounds by Acid, BaseReactions and Liquid, Liquid Extraction.Okay, so we had solid benzoic acid, ethyl 4- aminobenzoate, and9-fluorenone all dissolved in diethyl ether. We separated...
- Q Complete Table 1 by calculating the volume of2.0 mg/mL myoglobin, 6.0 M GuHCl, and 0.5 M phosphate buffer neededto make the 15 solutions needed for the experiment.#[Myoglobin] (mg/mL)Myoglobin stock volume(mL)[GuHCl]...
- Q Calculate Delta H rxn for the following reaction (watch thesignificant figures)2 NOCl (g) --> N2(g) + 02(g) + Cl2(g)Given the following set of reactions;1/2 N2(g) + 1/2 02(g) ---> NO(g)...
- Q Describe the procedure you would follow to determine theconcentration of Vitamin C in a sample if the volume of DCPIPrequired to reach the endpoint was more than the 25-mL flask...
- Q A hydrogen-oxygen fuel cell is used in the space program togenerate clean energy. Describe, in detail, the principle andprocess of electrical energy generation from hydrogen-oxygen fuelcell. Also include in the...
- Q Chromic acid (H2CrO4) is an acid that isused in ceramic glazes and colored glass. The pH of a 0.070M solution of chromic acid is the same as the pH of...
- Q (a) Calculate the standard free-energy change (ΔG°) for thefollowing oxidation-reduction reaction. Cu(s) + Br2(aq) → Cu2+(aq)+ 2 Br−(aq)(b) Calculate the equilibrium constant for this reaction at 298K.
- Q The solutions at the two Pb electrodes of a concentration cellwere prepared as follows:Cell A: A mixture of 1.00 mL of 0.0500 MPb(NO3)2 with 4.00 mL of 0.0500 M KX...
- Q Describe the preparation of 40 L 0.02 M phosphate buffer, pH 6.9starting from Solid KH2PO4and K2HPO4
- Q What is the minimum mass of ice at 0.0 C that must be added to 1kg of water to cool the water from 28 C to 12 C? (heat of...
- Q A rigid stainless steel chamber contains 210 Torr of methane,CH4, and excess oxygen, O2, at 200.0
- Q Determine whether the entropy increases or decreasesin the given situations.a. A vapor that turned to solidb. A vapor condenses to a liquidc. A mole of vapor becomes solidd. A liquid...
- Q A 100.0 mL solution containing 0.976 g of maleic acid (MW =116.072 g/mol) is titrated with 0.296 M KOH. Calculate the pH ofthe solution after the addition of 56.00 mL...
- Q The active ingredient in a zinc nutritional supplement isZnSO4·7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containinga mix of the active ingredient and an inactive filler were groundand mixed...
- Q In the precipitation reactionNa2(C2O4)2- (aq) +CaCl2 (aq) -----> Ca(C2O4) (s)+ 2NaCl (aq), how do I determine how many grams of the reactants Ineed to yield 5 grams of the precipitate?
- Q You are titrating 25 mL of 0.25 M Ascorbic Acid solution ith0.15 M NaOH. Ascorbic Acid is an organic diprotic acid, H2A, thatis found in many natural materials. Ka1 =...
- Q A 9.10-g sample of solid MnCl2·4H2O was heated such that thewater turned to steam and was driven off. Assuming ideal behavior,what volume would that steam occupy at 1.00 atm and...
- Q Name the acid used in baking powder and what role doesit do in baking
- Q Can all nuclei be studied by NMR? What property of a nucleusdetermines whether it is NMR active?
- Q Determine the thermochemical equation for the oxidation of onemole of sucrose by a biological system.  (That meanswrite a balanced chemical equation AND its enthalpy ofreaction.)Is the reaction gaining or losing...
- Q 1.) Explain the advantages of a FT instrument over a constantwavelength diffuse instrument.2.) Explain why Infrared spectroscopy uses interferometersrather than constant wavelength spectrometers.
- Q Discuss the chemistry of the peroxo complexes of chromium(IV),(V), and (VI). (b) Discuss the electronic structure of Mn(III)compounds. (c) Discuss using suitable examples, the chemistry ofmanganese(IV) complexes.
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!