Chemistry question and answers for September 24, 2023
- Q HCl and H2SO4Identify the poster’s two additional molecules (HCl and H2SO4)as ionic or covalent and then name them according to IUPACrules.Discuss how you identified each as ionic or covalent and...
- Q When 25.0 mL of a 6.23×10-4 M sodium carbonate solution iscombined with 15.0 mL of a 7.76×10-4 M lead acetate solution does aprecipitate form? yes (yes or no)For these conditions...
- Q After reacting 1.45 g of salicylic acid with 5.0 mL of aceticanhydride, 1.75 g of acetylsalicylic acid is obtained. What is thecalculated percent yield? Provide your answer to the correct...
- Q Explain briefly why each of the following is not a possible setof quantum numbers for an electron in an atom. In each case,change the incorrect value to make the setvalid.What...
- Q In a 0.15M aqueous solution of butanoic acid C3H7CO2H , what isthe percentage of butanoic acid that is dissociated? You can findsome data that is useful for solving this problem...
- Q The equilibrium constant in terms of pressures for the reduction oftungsten(IV) oxide to tungsten at25 °C is Kp = 3.82×10-4,corresponding to the reactionWO2(s) +2CO(g) = (doublearrow) W(s) +2CO2(g)If the total...
- Q For the next three problems, consider 1.0 L of a solution whichis 0.6 M HC2H3O2 and 0.2 MNaC2H3O2 (Ka forHC2H3O2 = 1.8 x 10-5).Assume 2 significant figures in all of...
- Q If 0.580mol  of a nonvolatile nonelectrolyte aredissolved in 3.50mol of water, what is the vapor pressurePH2O of the resulting solution? The vapor pressure of purewater is23.8 torr at 25 ?C .In...
- Q For Bromocresol Green, which of the following reactions (if any)would it be appropriate to use your indicator to determine theendpoint for the reaction?  Circle YES or NO for eachreaction.  3 ptsHydrochloric acid...
- Q The tetraborate ion present in a 5.00 mL sample of a saturatedborax solution is titrated with 4.78 mL of 0.209 M HCl. Express allcalculations with the correct units and number...
- Q Arrange the following molecules in order of increasing averagemolecular speed.NO2 at 327K, He at 443K, He at 386K, O2 at 386KEnter formulas and temperatures in the boxes below: 1 =...
- Q For heterobimetallic complex M(dppf)Cl2, what are the possiblegeometries of metal center M? Draw the d-orbital splitting diagramsfor those geometries and fill them with electrons. What differencedo you observe that can...
- Q the following data were acquired in an experiment like ourswhere the initial amount of hydrogen peroxide is 0.0035 moles. Findthe rate constant.Moles of OxygenTime0.00007530.0080.00034661.8390.00073984.1500.00105967.4230.0000753 0.008 0.0003466 1.839 0.0007398 4.150 0.00105967.423
- Q A 10.0 g piece of pure aluminum is placed in 75.0 mL of 0.54 Mhydrochloric acid at STP condition. They react as follows: 2Al +6HCl → 3H2(g) + 2AlCl3 Calculate...
- Q A solution contains Al3+ and Co2+. The addition of 0.3628 L of1.714 M NaOH results in the complete precipitation of the ions asAl(OH)3and Co(OH)2. The total mass of the precipitate...
- Q For each reaction, identify the Bronsted-Lowry acid, theBronsted-Lowry base, the conjugate acid, and the conjugatebase-HBr(aq)+H2O(l)→H3O+(aq)+Br−(aq) Express your answers as achemical expressions. Enter your answers in order given in thequestion separated...
- Q 1.)What is the rate law for the following mechanism in terms of theoverall rate constant kkk?A-Step1:Step2:A+BB+C⇌→CD(fast)(slow)Step1:A+B⇌C(fast)Step2:B+C→D(slow)Express your answer in terms of kkk and the necessaryconcentrations (e.g., k*[A]^3*[D]).B-Consider the reaction2X2Y2+Z2⇌2X2Y2Z2X2Y2+Z2⇌2X2Y2Zwhich has...
- Q When did you finally stoped heating Cu and sulfur mixture inchemical reaction of copper lab? Which of the following are redoxreactions ?Explain your answer on the basis of changes in...
- Q For the following reaction, 22.0 grams of iron are allowed toreact with 45.3 grams of chlorine gas . iron(s) + chlorine(g)iron(III) chloride(s) . What is the maximum mass of iron(III)chloride...
- Q is220 grams sugar in 100 grams water at 40 degrees celciussupersaturated?
- Q ORGANIC CHEMISTRY:Draw a balanced chemical reaction for the synthesis of methylsalicylate from aspirin tablets. Calculate the theorectical yieldfor the product in grams using the limiting reagent aspirin,remembering you are extracting...
- Q Calculate DG for the following reaction if the partial pressureof CO2 is .05 atm at 25oC.CaCO3(s) yields CaO(s) + CO2(g)--------------------------------------------------------Ca(s) + CO2(g) + 1/2O2(g) yieldsCaCO3(s)Â Â Â Â Â Â Â Â Â Â Â Â DHo=-814.1kJÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â DSo=-266.3J2Ca(s) + O2(g) yields2CaO(s)Â Â Â Â Â Â Â Â Â Â Â Â Â Â DHo=-634.9kJÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â DSo=-250.3J
- Q For Ammonia synthesis reaction: 3H2(g)+N2(g)?2NH3, Under 673 K,1000 kPa, the initial molar ratio of H2 and N2 is 3:1 and then thisreaction reach equilibrium. The molar ratio of NH3 is...
- Q In a laboratory experiment, 50.0 g of gaseous propane (C3H8) washeated in the presence of air (O2) to produce gaseous carbondioxide and gaseous water. upon completion of the experiment, 13.0g...
- Q Spectrophotometric Analysis of Fe2+ using1,10-phenanthrolineGiven the following data, calculate the percent by massFe2+ in the unknown sample. Assume the experimental dataprovided is obtained using the same procedure you will be...
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