Chemistry question and answers for September 28, 2023
- Q A mixture of 0.05263 mol of H2O, 0.01327 mol of CH4, 0.07198 molof CO, and 0.06917 mol of H2 is placed in a 1.0-L steel pressurevessel at 1303 K.The following...
- Q Find the net ionic reaction (precipitation). Write NR if thereis no reaction.(AlCl3 + KI)(Zn(C2H3O2)2 + KI)(AlCl3 + AgNO3)(Zn(C2H3O2)2 + AgNO3)(AlCl3 + Na2CO3)(Zn(C2H3O2)2 + Na2CO3)(AlCl3 + NaOH)(Zn(C2H3O2)2 + NaOH)(AlCl3 + Na3PO4)(Zn(C2H3O2)2...
- Q At 35oC, K = 1.6 x 10-5 for the followingreaction2NOCl(g) <----> 2NO(g) + Â Â Cl2(g)Calculate the concentration of all species at equilibrium foreach of the following original mixtures.1) 3.0 moles of...
- Q Describe the nature of “random error†and “systematic errorâ€.Provide three examples for each of these two categories of errors.Could they be eliminated and how?
- Q What is denitrification in the context of ozone depletion, andwhy is it important?Group of answer choicesa) Denitrification is the significant lowering of theconcentration of N2 (g) in the stratosphere. Thisprocess...
- Q The following are at constant T and P. The conditions describedin (a) and (b) below are initial conditions. Calculate Qc andCLEARLY indicate, with an arrow (“?â€, or “?â€) to which...
- Q A) A saturated solution of manganese(II) hydroxide was prepared,and an acid–base titration was performed to determine its Ksp at 25°C. The endpoint was reached when 55.00 mL of the manganese(II)hydroxide...
- Q E. coli asparate transcarbamoylase (ATCase) has a Hillcoefficient of 1.7 and Vmax 4.5 uM/min. The definition of Vmax isKcat * [Etot], where kcat is the rate constant for formation ofproduct....
- Q 1. What are necessary buffer components?2. Write reaction equations to explain how your aceticacid/sodium acetate buffer reacts with an acid and a base. Why pHdoes not change? Explain.3. At which...
- Q A 4.2 mol sample of Kr has a volume of 953 mL. How many moles ofKr are in a 4.90 L sample at the same temperature and pressure?_______molA flexible container...
- Q no other data provided8. Determine the calcium carbonate equivalent (CCE) of thefollowing compounds: (amount that has the same neutralizing valueas 100 g pure CaCO3) (a) KOH (b) Mg(OH)2 (c) and...
- Q Liquid Propane (C3H8(l)) enters a combustion chamber at 25degrees C and 1 atm at a rate of 0.4 kg/min where it is mixed andburned with 150% excess air that enters...
- Q From Part A:Mass of KxFe(C2O4)y· zH2O prepared : 5.100 gMass of FeCl3 : 1.60 gFrom Part B:% Potassium in compound : 17.95 %% Iron (from ion exchange & titration vs....
- Q Ascorbic acid or Vitamin C,H2C6H6O6, is a weakdiprotic acid. What are the concentrations of H+,H2C6H6O6,HC6H6O6- andC6H6O62- in a 0.10 Maqueous solution of ascorbic acid? For ascorbic acidKa1=7.9x10-5 and Ka2= 1.6x10-12.
- Q 1. Draw and label the band diagram for Carbon Monosulfideanion(CS^-)2. Draw the MO diagram for Carbon Monosulfide anion (Cs^-) andgive bond order.
- Q Discuss why the constituents of an aqueous solution can only beseparated by evaporation and the concentration of the solute in thesolution calculated in % (m/v) and in molarity
- Q You prepare a solution by adding 20.0 g Urea[(NH2)2CO] to 125 g water at25.0oC & vapor pressure 23.76 torr.      The solution vapor pressureis 22.67 torr. Calculate the molecular weight of...
- Q No other data provided3. The cations on an exchangeable site of a 40 g soil weredisplaced by repeatedly washing by a salt and found to be 40 mgCa+2, 11.5 mg...
- Q Summarize main factors that have influence on SN2 typereactions: reactivity of the nucleophile, nature of the leavinggroup, structure of the alkyl portion of the substrate and thenature of the solvent...
- Q Sulfur dioxide (SO2 ) is a gas that is a polluantresponsible for acid rain. It can be formed by the followingreaction:Â Â Â Â Â Â Â Â Â Â Â Â Â Â H2S (g) + O2 (g) ?SO2(g) +H2O(g)Â Â Â (unbalanced)What volume of 4M...
- Q What is the reaction order with respect to initiatorconcentration (e.g. first order, second order, etc.) for each ofthe following steps:a. Initiationb. Propagationc. What is the relationship between initiator concentration andcritical...
- Q A suspension of 4-aminophenol (1.0equivalent)in water (1mL of water for every 2.7 mmol of 4- aminophenol)is heated at 65 °C to 75 °C for 5 minutes with stirring. Aceticanhydride (1.5equivalents)is...
- Q If a gas mixture at 298 K, which contains 90% N2, 5% H2O, and 5%O2, is instantaneously heated to 2000 K, plot the NO concentrationas a function of time.Plot the...
- Q what is meant by stokes shift and anti stokes shift inspectroscopy?
- Q How would the accuracy of your determined Keq change if all yourvolume measurements were made with graduated cylinders rather thanpipets?
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