Chemistry question and answers for August 09, 2023
- Q 10.35) predict the geometry of the following ions usingthe electron-pair repulsion modelA) Clo32B) Po432C) SCN2D) H2O1
- Q Could someone explain how to solve this for me?We have been studying fluoride in drinking water. If you were toexamine your toothpaste one of the active ingredient is most likelyto...
- Q 10.34 ) use the electron-pair repulsion model to predict thegeometry of the following moleculesA) GeCl2B). AsCl3C) So3D) XeO4
- Q A nuclear power plant operates at 40.0% efficiency with acontinuous production of 1002 MW of usable power in 1.00 year andconsumes 1.03×106 g of uranium-235 in this time period.What is...
- Q 10.53 ) what hybrid orbitals would beexpected for the central atom in each of the followingA). XeF2B) BrF5C). PCl5D). ClF41
- Q The main energy-coupling compound in biochemical reactions thatallows thermodynamically unfavorable processes to become favorableis ________.
- Q What is inductance? What is the origin of inductance?What is impedance? Howcan you use a capacitor and an inductor together in a circuit toachieve a desiredimpedance?
- Q I have a question about gibbs free energy vs gibbs standard freeenergy.We know that at equilibrium deltaG = 0 and Q = K, and deltaGstandard is a non-zero value.But I...
- Q 2attempts leftBe sure to answer all partsA 10.0−mL solution of 0.690 M NH3 is titratedwith a 0.230 M HCl solution. Calculate the pH after thefollowing additions of the HCl solution:(a)...
- Q Suppose a 50 year old female presents to the ER with chest painafter eating a meal consisting of a large portion of red meat,creamy sauce, and potatoes. The woman's bloodwork...
- Q 10.41 predict the geometries of thefollowingA) SaCl53B) PF62C) CIF22D) IF42
- Q Differentiate betweenReal and Ideal gas?Please explainextensively and give examples.
- Q 1) what are the effect of leaving groups when comparing1-chlorobutane vs. 1-bromobutane and compared 2-chlorobutane vs.2-bromobutane. 2) What are the effect of structures – 1°, 2°, and3° halides when comparing...
- Q what are the three types of injections with GC and when theyshould be used. Explain why cold trapping and solvent trapping areused and what they are.
- Q Explain the advantages and disadvantages of open tubular vspacked columns. Why aren’t packed columns use with HPLC?
- Q It’s stated that a H2 molecule is glued together by a pair ofelectrons. Now you have read about molecular orbitals inhomonuclear diatomic molecules. What is chemical bonding? Why aremolecules hold...
- Q A 100.0 −mL buffer solution is 0.105 M in NH3 and 0.135 M inNH4Br.A. What mass of HCl could this buffer neutralize before thepH fell below 9.00B. If the same...
- Q The boiling point constant for water is 0.51 Kkg/mol. Calculateboiling point of water in a solution gf 0.010 mol/kg of sugar and asolution of 0.010 mol/kg of NaCl.
- Q 1)how many moles of Al are in 1mole of KAI(SO4)2---->12H20?2)what is the molar mass of potassium aluminum sulfatedodecahydrate?3)if you have 1.20g of Al, how many grams of potassiumaluminum sulfate dodecahydrate...
- Q Aqueous hydrobromic acid HBr reacts with solid sodium hydroxideNaOH to produce aqueous sodium bromide NaBr and liquid water H2O.If 0.0735g of water is produced from the reaction of 1.6g ofhydrobromic...
- Q A mixture of 1.397 g of H2 and 70.76 g of Br2 is heated in a2.00 L vessel at 700. K. These substances react according to H2(g)+ Br2(g) ↔ 2...
- Q A mixture of hydrocarbons (10mol% methane, 20 mol% ethane,30mol% propane, 15mol% isobutane, 20 mol% n-butane, 5 mol%n-pentane) is flashed into a separator at 80 F and 150 psia. Whatfraction leaves...
- Q For the following reaction, 24.5 grams of diphosphorus pentoxideare allowed to react with 13.3 grams of water.diphosphorus pentoxide (s) + water (l) -> phosphoric acid(aq)what is the maximum mass of...
- Q Which UV light hits earth's surface at the greatestintensity?
- Q What is the Lock signal? What nuclei generate the Locksignal?
- Q Use Charles's law to complete the table. (Assume pressure andnumber of moles of gas to be constant.)PartV1T1V2T2A119 L10.2 ∘C__106.4 ∘CB__135 K173 L314 KC2.15 L16.4 ∘C2.23 L__D15.6 cm3__18.2 cm310.1 ∘CA&B Express...
- Q Ammonium nitrate (NH4NO3) is a high explosive because it isunstable and decomposes into several substances as follows:_NH4NO3--> _N2 + _O2 + _H2O. Balance the equation and then findthe number of...
- Q For each solution: a.) Calculate the molarity b.)Write achemical equation representing the formation of a solution yourequation should start with: CH3CH2OH----> c.) Draw a molecularpicture of the solution showing ions...
- Q Determine the Ph0.120 M NaClO and 4.50×10−2 M KIExpress your answer using two decimal places.
- Q Hi anyone can answar these questions or only part of them ?1-What are the advantages of using thionyl chloride rather thanother available chlorination agents?2-When an oil bath is used to...
- Q An89.0 g sample of ice is at -24 C. How much energy is required toconvert the ice to steam at 167 C? Plot a heating curve with energyon the x-axis...
- Q In acidic solution, the sulfate ion can be used to react with anumber of metal ions. One such reaction isSO42−(aq)+Sn2+(aq)→H2SO3(aq)+Sn4+(aq)Since this reaction takes place in acidic solution, H2O(l) andH+(aq) will...
- Q (a) A vessel is separated into two parts, A and B, by a bilayerlipid membrane containing Na+ channels. Part A holds an aqueoussolution of NaCl with concentration 0.15 mol L-1...
- Q Calculate the molarity of each of the following solutions:(a) 0.195 g of cholesterol, C27H46O, in 0.100 L of serum, theaverage concentration of cholesterol in human serum(b) 4.25 g of NH3...
- Q (a) A vessel is separated into two parts, A and B, by a bilayerlipid membrane containing Na+ channels. Part A holds an aqueoussolution of NaCl with concentration 0.15 mol L-1...
- Q (b) A vessel separated into two parts, A and B, by a bilayerlipid membrane contained an aqueous solution of KCl withconcentration 0.01 mol L-1 in part A and 0.1 mol...
- Q Mole fraction of n2Mole fraction of o2Answers given without the use of the given temperatures,pressures, and densities are wrong and have already been tried.A gaseous mixture consists of 76.0 mole...
- Q 36.What is the net ionic equation for the acid–base reaction ofhydrobromic acid with sodium hydroxide?A)NaOH(aq) + HBr(aq) → H2O(l) + NaBr(aq)B)Na+(aq) + –OH(aq) + H+(aq) + Br–(aq) → H2O(l) +...
- Q Calculate air to fuel ratio by mass, for a four-cylinder SIengine running on i) gasoline and ii) a mixture of 20% methanol and80% gasoline both at stoichiometric conditions. Assume gasoline...
- Q The relative energies of the eg and t2g orbitals are differentfor octahedral and tetrahedral complexes.a. Draw both diagrams with labeled d orbitals (which d orbitalsare which)b. Explain why the different...
- Q Consider the four coordinate complexes [FeCl4]2-, [Ni(CN)4]2- or[AuCl4]-.a. Which of these complexes do you expect to be square planar?Why?b. Explain why this geometry is preferred using a crystal fieldsplitting diagram...
- Q Determine the molarity of each of the following solutions:(d) 2.76 kg of CuSO4?5H2O in 1.45 L of solution(e) 0.005653 mol of Br2 in 10.00 mL of solution(f) 0.000889 g of...
- Q Calculate the freezing point and melting point of a solutioncontaining 10.0 g of naphthalene (C10H8) in100.0 mL of benzene. Benzene has a density of 0.877g/cm3
- Q Draw and label crystal field splitting diagrams (includingorbital labels) for the following complexes. Calculate he ligandfield stabilization energy as a factor of Delta for eachcomplex.a. [Co(OH2)6]2+b. [RH(NH3)6]2+c. [NiCl4]2-
- Q Compare the energy available from the combustion of a givenvolume of methane and the same volume of hydrogen at the sametemperature and pressure. (Standard enthalpy of formation ofmethane is -75...
- Q Write the chemical formula or name the following complexes anddraw AND LABEL all possible isomers (ignore counter-ions indrawing).a. [CoCl3(OH2)3]-b. [MoCl(NH3)5]SO4c. diaquotetracarbonylruthenium(III)d. diamminedichloroplatinum(II)
- Q Here are some questions with a bit of the data. if any can beanswered from this information great! if not, could someone pleaseexplain how to find this information.Using your absorbance...
- Q Let
- Q 1. Use information in the balanced chemical formula below toanswer the next 4 questions  C2H6                   +     7   F2           →        2 CF4           +        6 HFmw = 30.06 amu                        mw =...
- Q Convert the following equivalents to masses/volumes (gor mL):1. 1.5 equivalents of KOH2. 1.4 equivalents of RCO3H3. 1.2 equivalents of NaOH4. 0.2 equivalents of NaOH5. 3.5 equivalents of ethyl bromide
- Q -What are Serial dilutions?how to do one, why we do one IN THE LAB and the properprocedure.-EXPLAIN what a titer is and how to determine it.-How to determine the concentration...
- Q Hydrazine (N2H4) reacts with oxygen gas to form nitrogen gas andwater.A. Write a balanced equation for this reactionB.How many grams of water are theoretically produced when 15.8gof hydrazine react with...
- Q KEY PART that is TRICKY for me: (The vapor pressure of water is23.78 mmHg at 25∘C)A common way to make hydrogen gas in the laboratory is to placea metal such...
- Q What are the thermodynamics properties of a detergent moleculeforming a micelle in an aqueous environment?
- Q isit correct in thinking that in SN2 reactions the nucleophileattacks the alpha carbon. While in E2 reactions the base attacksthe H on the beta carbon?
- Q Discussion about: FertilizersFertilizers and pesticides are chemicals that have been used byhomeowners and farmers to produce greener lawns and larger crops.These chemicals are proved to be harmful to humans and...
- Q Which ions in the following list are not likely to be found inchemical compoundsSr3+Cs+Ga4+Br2-Se2-?select all that apply
- Q Please anwer fast!!Please give work, please don't comment your a tutor and to emailyou. Please help me!! I know the answer is 5.53 but I need thecalculations/work to correctly work...
- Q Hydrofluoric acid, HF, has a K a of 6.8 × 10Ã. What are [H3O+ ],[Fà ], and [OHà ] in 0.790 M HF?[H3O+] = (unrounded)[F ] = M[OHà ] =...
- Q A sample of water with a Fe2+ concentration of 500ppm. Additionally Eh is 0.503 V and pH is 3.45. Will Fe(OH)3(s)stay in solution? What would be the equilibrium Eh at...
- Q Find PH of solutions from list belowBottle A : 200ml of 0.0750 M hcl (aq)Bottle B: 200ml of 0.200 M methylamine (CH3NH2, PKb=3.36, molarmass = 31.0)Bottle C 100g of solid...
- Q In a study, 2-MeV neutrons enter a target made of water and aregradually absorbed in the water.Assume:1. The neutrons don't interact with oxygen2. Their capture cross section before they thermalize...
- Q Please answer all three thank you!Part ATo what volume should you dilute 155 mL of an 8.60 M CuCl2solution so that 60.0 mL of the diluted solution contains 5.9 gCuCl2?...
- Q a) Calculate the change in entropy on heating an ideal gas from300K to 500K at constant pressure.b) Calculate the change in entropy on heating an ideal gas from300K to 500K...
- Q whythe compound to be crystallized should be very soluble in the hotsolveng and less soluble in the cold solvent ??and why impure solid dissolves in the minimum volume of hotsolvent...
- Q A 0.9000 g sample of a mixture of NaCl and KCl is dissolved inwater, and the solution is then treated with an excess ofAgNO3 to yield 1.923 g of AgCl....
- Q Please answer:Discuss how many anions are able to contaminate groundwater.
- Q What additives may be used to prevent acid catalyzed hydrolysisof drugs containing ester moieties in drug formulations?
- Q Menthol is a crystalline substance with a peppermint taste andodor. When 1.19 g of menthol is dissolved in 25.0 g of cyclohexane,the freezing point of the solution is lowered by...
- Q Imagine two solutions with the same concentration and the sameboiling point, but one has ethanol as the solvent and the other hascarbon tetrachloride as the solvent. Determine that molalconcentration, m...
- Q Firefly luciferase is the enzyme that allows fireflies toilluminate their abdomens. Because this light generation is anATP-requiring reaction, firefly luciferase can be used to test forthe presence of ATP. In...
- Q This is a physical chemistry question.Write down for yourself the secular determinant for thehypothetical molecule linear H3 making the Huckelapproximation, using the 1s atomic orbitals from each atom as thebasis...
- Q Which of the following types of solids typically containelectronegative atoms?Select all that apply.Select all that apply:metallicioniccovalent networkmolecular
- Q According to the ideal gas law, a 9.776 mol sample of xenon gasin a 0.8177 L container at 499.7 K should exert a pressure of 490.2atm. By what percent does...
- Q (I already have part A but still still include it anyways so youcan use its data to solve for parts B and C.Chemical energy is released or absorbed from reactions...
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