Chemistry question and answers for July 23, 2023
- Q 3/ At 2000 K , nitrogen gas and oxygen gas combine to formnitric oxide according to the following reaction: N2(g) + O2(g) ⇌2NO(g) ΔH = +1.81 KJwith an equilibrium constant...
- Q Explain the effects of each of the following on the rates ofgluconeogenesis and/or glycolysis.A. Increasing the concentration of blood glucose.B. Increasing the concentration of glucose-6-phosphate.C. Increasing the concentration offructose-1,6-bisphosphate.D. Increasing...
- Q Using your average Keq value (.3948), pleasecalculate what the equilibrium concentrations of Fe3+ ,SCN- , and FeSCN2+ in a solution made bycombining 10.00mL of 0.0020M Fe(NO3)3 and10.00mL of 0.0020M KSCN.
- Q How does the packing found inside a fractional column work toseparate a mixture of two components?
- Q Part AA volume of 105 mL of H2O is initially at room temperature(22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water.If the final temperature of...
- Q 7. Given the standard reduction potential for the following twohalf-cell reactions (in the presence of 1.00 M HCl):Fe3+ + e <==> Fe2+, E0 = + 0.68 VAsO4 - + 2H+...
- Q Vanillin is the compound containing carbon, hydrogen, and oxygenthat gives vanilla beans their distinctive flavor. The combustionof 30.4 mg of vanillin produces 70.4 mg of CO2 and 14.4 mg of...
- Q Fluoride Selective Ion Electrode. Describe howa fluoride selective ion electrode measures the fluoride ionconcentration and explain why the potential approaches 0 at highconcentrations
- Q A) Does the pH increase, decrease or remain the same on theaddition of the of the following?    -     A.    B.     C.  LiF to and HF...
- Q What is the molarity of a solution of s2o32- if 58 ml wererequired to titrate 42 ml of a 0.2M solution of IO3-
- Q 5. For the titration of 50.00 mL of 0.0500 M Ce4+ with 0.1000 MFe2+ in the presence of 1 M H2SO4, please calculate the systempotential while 3.00 mL of Fe2+...
- Q A chemical process stream enters a shell-and-tube exchanger at atemperature of 200 °F and does two passes on the shell side,exiting the exchanger at 170 °F. For this particulate scenario,...
- Q At T=Tc, (∂P/∂V)V T=Tc = 0 and (∂2P/∂V2)T=TC = 0. Use thisinformation to derive expressions for a and b in the van der Waalsequation of state in terms of experimentally...
- Q Phenolphthalein was the indicator you used in your titration.a. What made phenolphthalein agood choice of indicator? (Meaning, how do you choosean appropriate indicator for atitration.)b.You used only a couple drops...
- Q Name the complex ion [Cu(NH3)2(H2O)4]2+. The oxidation number ofcopper is +2.
- Q Which of the following salts would be more soluble in acidsolution than in pure water?PbBr2AgNO3SrCl2AgIPlease provide a thorough explanation as I was absent duringthis lecture... Thank you!!
- Q 1,All of the following are true concerning nuclear fissionexcepta) Uranium is typically split into smaller atomsb) Nuclear reactors are used to make electricityc) The energy involved can be calculated using...
- Q 2. Outline essential structural features a 1,4-Dihydropyridinemust possess for effective Ca2+ channel blocking capability. Whyare dimethyl 1,4-Dihydro-2,6-Dimethylpyridine-3,5-Dicarboxylate anddiethyl 1,4-Dihydro-2,6-Dimethylpyridine-3,5-Dicarboxylateineffective in this regard?
- Q 1. Ka for hydrocyanic acid,HCN, is4.00×10-10.  Kafor acetylsalicylic acid (aspirin),HC9H7O4, is3.00×10-4. Ka forphenol (a weak acid),C6H5OH, is1.00×10-10What is the formula for thestrongest acid?2. Ka for nitrous acid,HNO2, is4.50×10-4. Ka forhydrocyanic acid,...
- Q Part III (Plus answers to questions posted in the laboratorymanual):i) What are Q, [Ag+(aq)anode], and [Ag+(aq)cathode] whenEmeasured becomes 0 mV for a concentration cell prepared from halfcells having initial concentrations...
- Q The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 =7.53. Calculate the pH at each of the following points in thetitration of 50.0 mL of...
- Q a) The reaction temperature for this lab is significantly abovethe boiling point of the solvent used (ethanol boils at 78 o C; thereaction mixture was heated up to 140 o...
- Q Complete combustion of 7.70 g of a hydrocarbon produced 23.6 gof CO2 and 11.3 g of H2O. What is the empirical formula for thehydrocarbon? Insert the subscripts:CH
- Q Fora 0.110 M H3PO4 solution, find the equilibrium concentrations ofH3PO4, H2PO4-, HPO4^2-, PO4^3-, and H3O+.For H3PO4: Ka1= 7.5x10^-3, Ka2= 6.2x10^-8, Ka3=4.2x10^-13
- Q Calculate the volume, in milliliters, of a 0.216 M NaOH solutionthat will completely neutralize each of the following: 1.) 3.71 mLof a 1.32 M HNO3 solution. 2.) 8.10 mL of...
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