Chemistry question and answers for September 12, 2023
- Q biochemical analysis and pHHow might the information gained from this lab pertaining tobiological molecules be useful to you, or how can you apply thisknowledge to your everyday life as a...
- Q Please show all work!Balance the following reaction in a basic solution:Ag(s)+Zn^2+(aq)--->Ag2O(aq)+Zn(s)
- Q 1. Please explain why “noncompetitive inhibitionâ€- where it isobserved experimentally- is more likely to be a coincidence than areveal of something profound in the mechanism of an enzyme (incontrast to...
- Q Use the following half-reactions to write three spontaneousreactions, and calculate E cell for each reaction:a. Au+ (aq) + e- ----> Au (s) E= 1.69Vb. N2O (g) + 2H+ (aq) +...
- Q What do you understand by \" hydrated ions\" ? Giveexamples of hydrated ions and explain at least one hydrated ion'ssturcture and formation.
- Q Calculate the value of deltaG for the reactionSi3N4 + 3O2 = 3 SiO2(alpha-quartz) + 2 N2at 800 K. What percentage error occurs if it is assumed thatdeltaCp for thereaction is...
- Q 1.) For the chemical reaction 2 Al + 3 H 2 SO 4 ⟶ 3 H 2 + Al 2 (SO 4 ) 3 what mass of hydrogen is produced...
- Q At the extreme limits (high and low end) of the plot of pH vs.log([HPO42-]/[H2PO4-]), the data points may appear as though theyare leveling off. Think about the [HPO42-]/[H2PO4-] ratio at...
- Q The vapor pressure of chloroform (CHCl3) is 173 mm Hg at 25 °C.What is the vapor pressure of a solution consisting of 268 g ofchloroform and 0.129 mol of a...
- Q A student ran the following reaction in the laboratory at 610K:CO(g) + Cl2(g) COCl2(g)When she introduced 0.183 moles of CO(g) and 0.211 moles of Cl2(g)into a 1.00 liter container, she...
- Q Research Question: How to determine thequantity of polyphenol oxidase in apple juice?Over the course of the semester, we studied several techniques(spectrophotometry, acid-base titrations, redox experiments) toanswer questions related to quantification...
- Q to a 100.0 mL volumetric flask are added 1.00 mL volumes ofthree solutions: .0100 M AgNO3, .205 M NaBr, and .100 M NaCN. Themixture is diluted with deionized water to...
- Q 40.00 mL of a 0.1000 M carbonic acid(H2CO3) was titrated with 0.2000 Msodium hydroxide.carbonic acid pka1:6.35 pka2:10.331.Calculate the volume of sodium hydroxide required to reach thefirst equivalence point.2.Calculate the volume...
- Q What is the pH of a buffer solution prepared by adding 15.0 g ofammonia chloide to 5.00 L of 0.200 M ammonia? Ka of ammonium is 5.8x 10^-102) What is...
- Q A mixture of gases is at equilibrium:4 NO (g) → 2 N2O (g) + O2 (g) ∆H = -199.5 kJ(a) Does the equilibrium shift to the left or to the...
- Q 500 lbm/min hydrocarbon feed is pumped into the feed pointhalfway to the top of a distillation tower. The tower feed point is40.0 feet above holding tank for the hydrocarbon. The...
- Q Phosphorus pentachloride is formed when phosphorustrichloride and chlorine react.PCl3(g) + Cl2(g) ⇌ PCl5(g)The equilibrium constant for the reaction is KC =37.8 at 110 °C. If 0.887 mol of phosphorustrichloride is...
- Q why are thermoset plastics not affected by solvents tothe same extent as thermoplastics?
- Q A sample of carbonic acid (0.125 L, 0.199 M, pKa1 =6.35, pKa2 = 10.33) was titrated with 1.75 M NaOH.Calculate the pH at the following points:Before the titration.At the 1st...
- Q For the reaction shown below, the initial concentrations forreactants and products are as follows: [A] = 0.27 M, [B] =0.0640 M, [C] = 0.0134 M, and [D] = 1.47M. If...
- Q how do i find ksp
- Q A volume of 13.96 mL of 0.1060 M NaOH solution was used totitrate a 0.618 g sample of unknown containingHC7H5O3.What is the molecular mass ofHC7H5O3? (report answers to 4 or...
- Q 1.a.) The heat of hydrogenation of cyclohexane is -120kJ/mol.The heat of hydrogenation benzene is -208kJ/mol. Is the heat ofhydrogenation of benzene more or less than you would expect1.b.) This is...
- Q Fe(II) can be precipitated from a slightly basic aqueoussolution by bubbling oxygen through the solution, wheich convertsFe(II) to insoluble Fe(III):4Fe(OH)+(aq)+4OH-(aq)+O2(g)+2H2O(l)arrow 4Fe(OH)3(s)How many grams of O2 are consumed to precipitate allof...
- Q In Southern Ontario, during freezing weather CaCl2 is spread onicy highways to melt the ice. Calculate the freezing point loweringand freezing point of a solution containing 250 g of CaCl2...
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