Chemistry question and answers for August 24, 2023
- Q Q#1. Draw a simple schematic of the electron energy levelsfor:a) an atom of H and a dimer (2 atoms) of Hb) an atom of Li, a dimer of Li, and...
- Q Determine the pH of (a) 0.20 M sulfuric acid (b) 0.20 Mhydrochloric acid, (c) 0.20 M sodium hydroxide, (d) 0.20 M aceticacid, and (e) 0.20 M solution of NH3 at...
- Q a statement of the first law of thermodynamics is that a. in aspontaneous process, the entropy of the universe increases b. thereis no disorder in a perfect crystal at 0...
- Q 1. Calculate the moles of product produced in the ractions, if4.00g of the hydrate was used in the reactionFeCl2 * 4H2O(aq) +H2C2O4(aq) ->FeC2O4 * 2H2O(s)+2H2O(I) + 2HCl(aq)Ni(NO2)2 * 6H2O(aq)+H2C2O4(aq) ->NiC2O4...
- Q - 25.0-L tank contains 295 gN2, 135 g O2, and 24.0 He gases. Calculatethe partial pressure of each gas and the total gas pressure at20.0oC.        (Answer:PN2 = 10.1 atm; PO2...
- Q “When a strong base is graduallyadded dropwise to a weak acid, the pH changes at each addition.When the appropriate quantity of base has been added to react withall of the...
- Q a 2.00 l container holds 4.00 moles of o2 and 2.70 moles of heat 293 k. What is the partial pressure of o2? He? what is the totalpressure?
- Q Definition of atmospheric pressure
- Q 1. How many grams of helium mustbe released to reduce the pressure to 69 atm assuming ideal gasbehavior?2. If the pressure exerted byozone, O3, in the stratosphere is 3.0×10−3atm and...
- Q A voltaic cell employs the following redox reaction:2Fe3+(aq)+3Mg(s)→2Fe(s)+3Mg2+(aq) Calculate the cell potential at25 ∘C under each of the following conditions.Part A standard conditionsPart B [Fe3+]=1.9×10−3M;[Mg2+]=1.80MPartC [Fe3+]=1.80M;[Mg2+]=1.9×10−3M
- Q Please show how work on how you got this answer.Q1: What will be the pressure (in mmHg) inside of a 50.0 Lcontainer that holds 7.00 moles of hydrogen gas at...
- Q You are asked to run a chromatographic column forseparation of a mixture of compounds: CH3CH2OCH3, CH3(CH2)3OH,CH3CO2H, CH3(CH2)8CH3. Two solvents have been provided i.e. acetoneand hexane. Which eluting solvent would you...
- Q A municipal water treatment plant is designed to produce 20million gallons per day (MGD) of potable water. The plant treatssurface water using coagulation followed by sedimentation,filtration, and chlorination. Although the...
- Q At 25 °C, all of the following ionic compounds produce a basicaqueous solution, except ____.A. NaFB. Na3PO4C. NaNO2D. NaHSO4
- Q A mixture of benzene and toluene is in a tank whose pressure ismaintained at 2.0 atm. Observation through a sight glass on thevessel shows that half of the tank volume...
- Q Using tabulated Ka and Kb values, calculate the pH of thefollowing solutions.Answer to 2 decimal places.A solution containing 1.9×10-1 M HNO2 and 2.4×10-1 M NaNO2.A solution made by mixing 110.00...
- Q What would be the effect of each of the following on thecalculated molar mass of the solute?1. some cyclohexane evaporated while the freezing point of purecyclohexane was being measured.2. some...
- Q 50.0mL of .500M NaOH is added to 25.0mL of .500M HCL in acalorimeter BOth are at an initial temperature of 25 C ans finaltemperature is 27.21 C. Assume the mass...
- Q (a) How many grams of CaCl2 are needed to make 798.0 g of asolution that is 32.5% (m/m) calcium chloride in water? Note thatmass is not technically the same thing...
- Q Denaturation can occur if a protein is heated or undergoeschanges in pH. Denaturation disrupts the secondary, tertiary, andquaternary structure of a protein. Would you expect the Biuret testto work on...
- Q Calculate the pH of a 0.800 M NaCH3CO2 solution. Ka for aceticacid, CH3CO2H, is 1.8 × 10-5. If someone could list the steps andcalculations that would be helpful. Thank you!
- Q To a 100.0 mL volumetric flask were added 7.00 mL of 1.70 M ofH3VO4, 1.401 g of NaH2VO4, and 15.00 mL of 1.5 M NaOH. The flaskwas filled to the...
- Q Assume Raoult's Law applies to a binary mixture of water andmethanol at 70 C.a) Which species should be considered species (a)? Why?b) Prepare a Pxy diagram for this mixturec) What...
- Q 13) Calculate the change in pH when 8.00 mL of 0.100 M HCl(aq)is added to 100.0 mL of a buffer solution that is 0.100 M inNH3(aq) and 0.100 M in...
- Q BCl3is a monomer that is a gas at room temperature while theanalogous Al compound is the Al2Cl2 dimer with 2 chlorides bridgingbetween the two Al's. Draw Lewis structures of each...
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