Chemistry question and answers for August 07, 2023
- Q How will you determine the relationship between acid/basemolarity and ∆H? Write specific equations for the reactions thatyou will use in this determination (at least 3). What variableswill you need to...
- Q a. A student performed Part 3 of the lab. A 360 ppm Ca2+standard required 22.34 mL of EDTA to reach the end point. Somewell water from my grandma’s farm required...
- Q a bag of \"bulldog ice melter\" is made up of a mixture of calciumchloride and magnesium chloride, but the ratio of salts in notlisted on the bad. A sample of...
- Q 20 mL of .10 M HC2H3O2l solution in a small beaker is titratedwith .10 M NaOH solution (at 25 C). Calculate the value of theequilibrium constant for this titration. Is...
- Q 1. In this distillation experiment we start the experiment with10 mL of liquid mixture ofcyclohexane and toluene. However, it isnot possible to obtain all 10 mL back under thecurrent procedureparticularly...
- Q Balance the following redox reaction in basic solution thenanswer these questions about the balanced reaction. Cl2(g) →Cl-(aq) + ClO-(aq)Part 1: What is the stoichiometric coefficient in front of Cl2in the...
- Q Write a net ionic equations to show how each of hte buffermixtures below would neutralize added H+ and OH-a. C6H5COOH and NaC6H5COO H+ + _______ ---> _____________OH- + _______----> _____________H+...
- Q --Given Values--Atomic Radius (nm) = 0.116FCC Metal = GoldBCC Metal: = SodiumTemperature ( C ) = 1017Metal A = TinEquilibrium Number of Vacancies (m-3) = 6.02E+23Temperature for Metal A =...
- Q Explain why carbocations are higher in energy than oxonium ions,despite oxygen being more electronegative than carbon. Second,state four factors that account for the relative stabilities ofcarbocations.
- Q Which following molecules expected to be polar? SiBr4 CO2 SO2BF3
- Q Suppose we are running a Gas Chromatography for a mixture ofstandard alkanes (C5-C18) in hexane solvent. How do we determinewhich alkanes are present in the standard from thechromatogram?
- Q Draw a diagram that illustrates thehyperconjugation that explains thesephenomena:- more substituted alkenes have lower heats of hydrogenation- more substituted carbocations are more stable- staggered conformations are lower in energy than...
- Q 1) A certain weak acid, HA, has a Ka value of4.6×10−7.Part ACalculate the percent ionization of HA in a 0.10 Msolution.Express your answer to two significant figures and include theappropriate...
- Q 3MgCl2(aq) + 2Na3PO4(aq) ------> 6NaCl(aq) + Mg3(PO4)2(s)1.) If given 29 grams of each reactant, determine the limitingreagent.  2.) Based on your answer from number 1, what is the theoreticalyield of this...
- Q There are a number of steps involved in determining theempirical formula of a compound. You will need to demonstrate thatyou can complete all of these steps as you determine the...
- Q A sample of gas initially has a volume of 1.42 L at 293 K and1.30 atm. What volume will the sample have if the pressure changesto 1.50 atm while the...
- Q The heme level regulates the globin synthesis because_____.
- Q A chemistry handbook lists the solubility of sodium iodide (NaL)as 184 g per 100 ml of water at 25o C.What would be the percent by mass of a NaL solution...
- Q How to determine the heat of formation of sucrose after a bombcalorimeter experiment?
- Q Consider the titration of a 33.0 mL sample of 0.175 M HBr with0.210 M KOH. Determine each of the following:Part A the initial pHExpress your answer using three decimal places....
- Q At 365 K, pure toluene and hexane have vapor pressures of 5.82 x104 Pa and 1.99 x 105 Pa, respectively.a.) Calculate the mole fraction of hexane in the liquid mixturethat...
- Q What major factor(s) affect the experimental determination ofthe heat of formation of magnesium oxide using calorimetry?
- Q The solubility product constant for CuI(s) is 1.1 x 10^-12.Calculate the value of E knot for the half-reactoin: CuI + e----> Cu + I-.For Cu+ + e- ---> Cu, E...
- Q 63. Which of the following is an omega 3 fatty acid?A.  18:0B.  18:3 Δ9,12,15  C.  16:1 Δ9D.  18:2 Δ9,12E.  20:4 Δ5,8,11,1464. Which of the following is an essential fatty acid?A.  lauric...
- Q A 20.00 mL solution of 0.0840M HOCl is titrated with 0.0560M KOHsolution. Calculate the pH after each of the following additions ofthe KOH solution:a. 15.00mLb. 30.0mLc. 32.0mL
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