Chemistry question and answers for October 07, 2023
- Q You are asked by your new boss to prepare 750 ml of a 0.5M pH8.4 tris- (hydroxymethyl) amminomethane (Tris) buffer. The Trisbase is provided in the solid form (mol. wt....
- Q Which of the following two reactions would have an equilibriumconstant more favorable to the right? Explain your answer.
- Q Liquid enters a valve at Tin and exits at Tout, Pout = 1 atm.Determine Tin and Tout to vaporize 20% of the feed if the liquid is1/3 benzene and 2/3...
- Q The followings are related to the ‘’Synthesis of NickelNanowires’’ which are broken down into 4 related questions.a ) Draw a schematic diagram of the synthesis of nickelnanowires by electrodeposition. Identify...
- Q Reaction is: Pb(NO3)2(aq) + 2KI(aq) ---> PbI2(s) + 2KNO3(aq)2.0 ml of 0.250M Pb(NO3)2 and 7.0 ml of 0.250M KIA) In your experiment, one of thereagents was limiting and the other...
- Q please answer and explainDetermine what type of crystalline solid each example belowrepresents.Covalent Network Ionic Metallic Molecular  Argon,ArCovalent Network Ionic Metallic Molecular  CopperNitrate, Cu(NO3)2Covalent Network Ionic Metallic Molecular  Copper,CuCovalent Network Ionic Metallic Molecular  Quartz,SiO2Covalent Network...
- Q Be able to calculate the amount of solute when given the ppm orppb concentrations and the amount of solution or solvent.Be able to calculate the molarity of a solution when...
- Q Calculate the cell potential for the following reaction aswritten at 25.00 °C, given that [Cr2 ] = 0.834 M and [Sn2 ] =0.0190 M. Standard reduction potentials can be found...
- Q Provide a high level (cartoon or box model) description of howan ICP-MS and how an IC work.
- Q A solution contains 0.018 mol each of I– , Br– , and Cl– . Usethe Ksp values given below to determine how much AgCl(s)precipitates out when this solution is mixed...
- Q A student left 40.0 mL of a bottle of 12.0 M HCl out overnight.The next morning, the bottle has only 35.7 mL of liquid left.Assuming that the volume change is...
- Q Determine the mass of chloride (MW = 35.45g/mol ) in grams present in 100 mL of a 0.187 M solution of aqueousFeCl3 (iron(III) chloride).
- Q Limiting reactnt experimentWhat happens, if you will not stir the reaction mixture whileheating on hot plate?What would be the effect, if you will add tap water instead ofdeionized water into...
- Q what are the advantages of GC/Ms compared to GC with otherdetectors?
- Q Do emotional or pain-induced tears differ?Is it possible to test tears and deduce if they are related tophysical pain or emotion, if so what is the difference between thetwo?
- Q An aqueous solution of ___ will produce a neutral solution?a. RbBrb. LiNO2c. LiFd NH4ClO4e.Rb2CO3
- Q Rank these forces from weakest to strongest:dispersion, dipole-dipole,H-bonds, dipole-induced dipole, ion-induced dipole, andion-dipole.
- Q Use the rules (in order) to assign oxidation numbers to each ofthe elements in the compounds below.hydroxylamineHNONH2OH___-7-6-5-4-3-2-10+1+2+3+4+5+6+7___-7-6-5-4-3-2-10+1+2+3+4+5+6+7___-7-6-5-4-3-2-10+1+2+3+4+5+6+7magnesium bromideBrMgMgBr2___-7-6-5-4-3-2-10+1+2+3+4+5+6+7___-7-6-5-4-3-2-10+1+2+3+4+5+6+7boric acidHBOH3BO3
- Q When solutions of silver nitrate and calcium chloride are mixed,silver chloride precipitates out of solution according to theequation2AgNO3(aq)+CaCl2(aq)?2AgCl(s)+Ca(NO3)2(aq)Part AWhat mass of silver chloride can be produced from 1.35L of a0.166M...
- Q Solve an equilibrium problem (using an ICE table) to calculatethe pH of each of the following solutions.1.0.17M CH3NH2.17M CH3NH3Cla mixture that is 0.17M in CH3NH2and 0.17M in CH3NH3Cl
- Q In an experiment, an acidic compound is separated from thecontaminant (either a basic or neutral compound) usingliquid-liquid extraction.List of organic extraction solvents available:- Dichloromethane- Diethyl ether- Ethanol- Ethyl acetate- Hexanes-...
- Q IV) Many enzymes obey simple Michaelis-Menten kinetics, whichare summarizedby the equation:rate = (V max [S])/([S]+K m ); where V max = maximum velocity, [S]= concentrationof substrate; and K m =...
- Q Calculate the pH of the solution that results from each of thefollowing mixtures.55.0 mL of 0.16 M HCHO2 with 75.0 mL of 0.13 M NaCHO2125.0 mL of 0.11 M NH3...
- Q In a bromine-producing plant, how many liters of gaseouselemental bromine at 277?C and 0.935 atm are formed by the reactionof 450. g of sodium bromide and 205 g of sodium...
- Q C6H14(l) + Br2(l) + light → C6H13Br(l) + HBr(g) How do I explainthis reaction?
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