Chemistry question and answers for July 07, 2023
- Q Consider a feed stream to a Claus process that consists of 10.0mole% H2S and 90.0% CO2. Onethird of the stream is sent to afurnace where the H2S is burned completely...
- Q A 75.0 −mL sample of 1.56×10−2 M Na2SO4(aq) is added to 75.0 mLof 1.28×10−2 M Ca(NO3)2(aq).what percentage of ca^2+ remainsunprecipitate?
- Q whta is the strongest possible acid in a solution when water(H2O) i sthe solvent? what is the strongest possibleacid in a solution when ethanol (CH3CH2OH orEtOH) i sthe solvent? what...
- Q A student decides to set up an experiment that night beforeperforming the experiment. A 0.40 g sample of sodium hydroxide in a250 mL beaker that has a mass of 112.58...
- Q Determine the pH of each of the following solutions.(a) 0.113 M ascorbic acid (weak acid with Ka =8e-05).(b) 0.261 M phenol (weak acid with Ka = 1.3e-10).(c) 0.150 M pyridine...
- Q 2. (20 pts) Match the chemicalequation with reaction type:Â Â Â SingleDisplacement, Double Displacement, Combination (Synthesis), orDecomposition.Cu(NO3)2(aq) +2NaOH(aq) Ã Cu(OH)2(s) +2NaNO3(aq)Â Â Â Â ______________________________Cu(OH)2(s) Ã CuO(s) +H2O(g)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ______________________________Â Â Â CuO(s) +H2SO4(aq) Ã CuSO4(aq) +H2O(l)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ______________________________CuSO4(aq) + Mg(s) Ã Cu(s)+...
- Q Acetaminophen is a weaker acid than carbonic acid (H2CO3), butaspirin is a stronger acid than carbonic acid. prepare a flowdiagram like the one in this experiment, showing a procedure thatcan...
- Q A buffer solution based upon sulfurous acid was created bytreating 1L of 1M sulfurous acid with NaOH until a pH of 1.347 wasachieved (assuming no volume change). To this buffer...
- Q ) Briefly define following figure-of-merit terms that arecommonly used for characterizing instrumental analysis methods:Sensitivity, Analytical Sensitivity, Linear dynamic range,Detection limit.
- Q How could you use a superposition of the stationary states forthe ground state and first excited state of the double square wellpotential to approximately describe ammonia inversion.
- Q An unknown compound (A), C10H12O, gave the following proton NMRdata: (a) triplet, at 1.0 ppm (3H) (b) quartet, at 2.4 ppm (2H) (c)singlet, at 3.7 ppm (2H) (d) multiplet, at...
- Q #1. In the reaction: C2H4(g) +H2O(g) <--->C2H5OH(g)      DeltaH = -47.8kJ         Kc = 9.00*103 @ 600. K    a. At equilibrium, PC2H5OH =200. atm & PH2O = 400. atm. CalculatePC2H4.  b. Which set of...
- Q An acetic acid/ sodium acetate buffer solution is also 0.020 MAlCl3. At what minimum pH will Al(OH)3 (s) precipitate form thissolution? What ratio of acetate ion to acetic acid concentrations([C2H3O2-]/[HC2H3O2])...
- Q SolutionConcentrationλmaxAbsorbanceColor RegionBlue # 2Dilute612.0 nm0.314OrangeBlue # 2Concentrated6.10.0 nm0.667OrangeRed # 4SolutionConcentrationλmaxAbsorbanceColor RegionA1.00 x 10-50.5060.208GreenB2.00 x 10-50.5060.442GreenC3.00 x 10-50.5060.607GreenD4.00 x 10-50.5060.874GreenQ3: Calculate the following for light with the same wavelengthas the λmax...
- Q According to the ideal gas law, a 1.041 molsample of carbon dioxide gas in a1.016 L container at 270.0 Kshould exert a pressure of 22.70 atm. By whatpercent does the...
- Q What is the pourpose of the cataytic converter that mostautomobiles use today? Is the catalyst heterogeneous orhomogeneous?
- Q Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is animportant compound in industry and agriculture.Calculate the pH for each of the following points in thetitration of 50.0 mL of a...
- Q In which one pair does the first species have a higher boilingpoint than the second?*** For any one pair, give your reasoning as to which specieshas the higher boiling point.A)...
- Q 3a) How many mL of a 1.21 M NaOH solution would contain 0.275moles of NaOH? ___ mL NaOH solution3b) How many mL of 12M HCl solution is needed to prepare...
- Q The pH of earth's water is controlled by the combination ofseveral equilibria found in water, as well as between water and theatmosphere. This problem considers a model for oceanic water....
- Q Calculate the probability of finding an electron in a 1s orbitaloutside of the first Bohr orbit (a0).
- Q Part A The reactant concentration in a zero-order reaction was9.00×10−2 M after 105 s and 1.00×10−2 M after 325 s . What is therate constant for this reaction? Express your...
- Q Answer the questions –- Print so I can read it in PeN 1) Assumethat a solvent having more isopropanol than solvent G was used inthe experiment. Predict whether dye A...
- Q Calculate the most probable value of r for an electron in ahydrogen 1s orbital.
- Q one mole of ice at 0 C is put into contact with one mole ofsteam at 100 C in an adiabatic enclosure. The pressure is heldconstant at one atmosphere. What...
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