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- 9. Calculate the Go in kJ/mol. 3Fe2+ (s) + 2Cr(aq) ⟶2Cr3+(aq) + 3Fe (s); Eocell=0.30 V Group of answer choices -170 +170 +87 +58 -195 10. Calculate Ecell in volts. Zn(s)|Zn2+(2.50x10-4M)||Sn2+(1.50M)|Sn(s) Eocell=+0.624 V Group of answer choices 0.736 0.635 0.512 0.848 no correct answerHow to convert 4.76pm to um? Showing the work. 4.76pm x___________m x_____________ um =________________um How to convert 25.0mL to cL? Showing the work. 25.0mL x______________ x ___________ = ______________cLUsing the Mg-Pb phase diagram below, if you start at point A andcool down very slowly to room temperature (point D), sketch the microstructure associated with each letter, determine what phases are present at each letter, determine the compositions for each phase, and determine the weight in each phase. The Mg-Pb mixture has 20 wt. % Pb in it. You start with 100 kg. A. 700ºC B. 600ºC C. 400ºC D. 25ºC
- A monolayer of CO molecules is adsorbed on the surface of 1.00 g of an Fe/AI2O3 catalyst at 77 K, the boiling point of liquid nitrogen. Upon warming, the carbon monoxide occupies 4.25 cm3 at O oC and 1.00 bar. What is the surface area of the catalyst?Determine the enthalpy of solution of MgCl2(s) in units of kJ/mol. The link provides the data needed. https://learn-us-east-1-prod-fleet01-xythos.s3.amazonaws.com/5df2d4e43336c/1279242?response-cache-control=private%2C%20max-age%3D21600&response-content-disposition=inline%3B%20filename%2A%3DUTF-8%27%27Hydration%2520enthalpies-%2520common%2520ions.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20200916T180000Z&X-Amz-SignedHeaders=host&X-Amz-Expires=21600&X-Amz-Credential=AKIAZH6WM4PL5SJBSTP6%2F20200916%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=a46787b52dc1cef15163e4c4ff519a111d03cbbb18f328c8c98afece27c86745Given below (c): Standard gibb's free energies (∆Gf0 kJ mol-1 ): UO2 = -962.7 UO22+ = -953.5 U4+ = -579.1 Fe2+ = -78.9 Fe(OH)3 ferrihydrite = -692.07 Mn2+ = -288.1 MnO2 pyrolusite = -465.1 HS- = 12.1 H+ = 0 H2O = -237.1 S0 = 0 Given: U(VI) as uraninite; UO2 (where Mn2+ = reductant; MnO2 pyrolusite = product): ∆ Gr0 = -21.3 KJ/mol E0 (emf) = 0.110 V n = 2 F = 96.42 QUESTION: Calculate Eh equation below to calculate at different pH: – Eh = E0 + (RT/nF) * lnK For U(VI) as uraninite; UO2 (where HS- = reductant; S0 = product): UO22+ + Hs- ---- > UO2 + S + H+ [A] pH 3 [B] pH 7
- What is the retardation factor of a pulse of dissolved benzene move through organic-rich wetland soil (organic carbon fraction of soil, foc=50%) if the effective porosity is 0.4 and the bulk density of the soil is 1.5 g/cm3. Follow these important hints: - Determine organic carbon partition coefficient (Koc) - Use this Equation: K oc = K d / f oc to calculate Kd. Select the range which includes your calculated answer. Group of answer choices 300 to 400 2.0 to 2.5 mg/l 2.0 to 2.5 2.6 to 4.8 0.5 to 1.0 2.6 to 4.8 mg/l None of these ranges include my answer.Substances A and B with capacity factors 6.3 and 11.4, respectively, are being carried by a mobile phaseflowing at a velocity of 0.53 mm/s. What is the length of a column required to separate these two substanceswith a resolution of 1? Assume that the sample zones for both A and B broaden based on the van Deemter equation H = 0.35 + 0.48/u+ 0.57u where Hand u are expressed in µm and mm/s, respectively.5 0.0030 0.0015 0.0005 6 0.0030 0.0057 0.0089 7 0.0086 0.0057 0.0089 Show the Calculations of Qc and Kc for Exp. 5-7 Please help me out. Thanks
- 10.11/ A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy is heated to 250°C (480°F), at which temperature it is entirely an a-phase solid solution . The alloy is to be melted to the extent that 50% of the speci- men is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composi- tion while holding the temperature con- stant. (a) To what temperature must the speci- men be heated? (b) How much tin must be added to the 1.5-kg specimen at 250°C to achieve this state? 10.15) A magnesium-lead alloy of mass 5.5 ka consists of a solid a phase that has a compo- sition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350°C (660°F). how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? 10.27 A hypothetical A-B alloy of composition 55 wt% B-45 wt% A at some temperature is found to consist of mass…What is ΔSsys for a condensation phase transition at 26.5 °C for a compound that condenses at 26.5 °C and the ΔHsys = -40.1 kJ mol-1 for this process? Express your answer in J mol-1 K-1 to at least two significant figures.Solid Na2S is slowly added to a solution of 1.0 x 10-3 M Cr3+ (with no change in volume). At what [S2-] will Cr2S3 start to ppt? For Cr2S3, Ksp = 1.0 x 10-20