Chemistry concepts and calculations

3) The specific heat of element X is 0.50/g K. The compound of X with oxygen has

3) The specific heat of element X is 0.50/g K. The compound of X with oxygen has the composition by mass of 63.19 % X and 36.81 % o. Using the Law of Dulong and Petit (at.wt.)(sp.…

3) The standard reduction potentials (E) for the following half reactions are gi

3) The standard reduction potentials (E) for the following half reactions are given in the attached tables NOS + 2H+ + 2e- NO2-+ H2O FAD + 2H+ + 2e- FADH2 If you mixed nitrate (NO…

3) The value of ??\' for the reaction below is 126 kJ How much heat (in k ) is r

3) The value of ??' for the reaction below is 126 kJ How much heat (in k ) is released when 2.00 mol of NaOH is formed in the reaction? 2Na202 (s) + 2H20() 4NaOH (s) + 02(8) A) 25…

3) The voltaic cell described by the cell notation has an Eo of 0.68 V. Calculat

3) The voltaic cell described by the cell notation has an Eo of 0.68 V. Calculate the Wmax (kJ) the cell has done if 6.4700 mol of MnO4-(aq) (Molar Mass - 118.94 g/mol) reacts. Ro…

3) Thermal Expansion James Bond is in a tight situation. He has to place a 10.00

3) Thermal Expansion James Bond is in a tight situation. He has to place a 10.00 mm diameter spherical Tungsten ball into a circular hole in a plate of Molybdenum to stop a nuclea…

3) To ionize Mg to Mg costs two times as much energy as to form Mg\'. The format

3) To ionize Mg to Mg costs two times as much energy as to form Mg'. The formation of O2- is endothermic rather than extothermic as for O. Nevertheless, magnesium oxide is always …

3) True or False (If statement is false, correct it so that it is true) a) A vac

3) True or False (If statement is false, correct it so that it is true) a) A vacancy is a point defect that occurs when an atom is missing from a lattice position. A perfect metal…

3) What happens to the loudness of a sound wave as you walk towards a sound sour

3) What happens to the loudness of a sound wave as you walk towards a sound source? Why? it will become louder because it is more intense Now choose from one of the following opti…

3) What is the best description of an aqueous solution at 25 o C with an OH - co

3) What is the best description of an aqueous solution at 25 oC with an OH- concentration of 1.7 x 10-9M? It is basic since it contains some OH- ions.   The solution is acidic. It…

3) What is the overall order of the following reaction, given the rate law? 2NO(

3) What is the overall order of the following reaction, given the rate law? 2NO(g) + H2(g) N2(g) +2H2O(g) Rate-k[NO2[H2] A) 0th order B) 1st order C 2nd order D) 3rd order 4) Give…

3) What is the theoretical m HCI with 0.010 M NaOH ? aximum and minimum pH one c

3) What is the theoretical m HCI with 0.010 M NaOH ? aximum and minimum pH one could expect in a titration of 0.010 M the equivalence point of 0.010 M HC? with 0.010 M NaOH? What …

3) What is the theoretical yield of hydrogen gas when 12.5g of sodium metal reac

3) What is the theoretical yield of hydrogen gas when 12.5g of sodium metal reacts with an excess of water, while also producing sodium hydroxide? (need balanced equation). What i…

3) Which functional group is absent in the IR spectrum shown below? 35 4 45 wael

3) Which functional group is absent in the IR spectrum shown below? 35 4 45 waelength (am) 7 8 9 10 11 12 13 14 15 16 5 5.5 6 60- N 800 6l 4000 3500 3000 2500 2000 1800 1600 1400 …

3) Which of the following statements is FALSE? a) When K is very large, the forw

3) Which of the following statements is FALSE? a) When K is very large, the forward reaction is favored and essentially goes to completion. b) None of the answers are correct. c) …

3) Which of the following statements is FALSE? a) When K is very large, the forw

3) Which of the following statements is FALSE? a) When K is very large, the forward reaction is favored and essentially goes to completion. b) None of the answers are correct. c) …

3) Which statement about buffers is faise a) they are prepared with a weak acid

3) Which statement about buffers is faise a) they are prepared with a weak acid and its conjugate base b) they resist changes to pH c) they always maintain a neutral phH d) they a…

3) Which statements about oximes are true? Check all that apply. (10 pt) a) Acyl

3) Which statements about oximes are true? Check all that apply. (10 pt) a) Acyl chlorides are reactive because of the +l effect of the chlorine atom. b) Hydrolyses of esters are …

3) Write the electronic structures for the following elements: Co, S, Br, V, and

3) Write the electronic structures for the following elements: Co, S, Br, V, and Cu. (5 points) Explain the valences for each, showing what may happen to the electronic structure …

3) Write the electronic structures for the following elements: Co, S, Br, V, and

3) Write the electronic structures for the following elements: Co, S, Br, V, and Cu. (5 points) Explain the valences for each, showing what may happen to the electronic structure …

3) You have a solution that contains 0.1 M Pb2+, 0.1 M Hg2+ and 0.1 M Fe3+. You

3) You have a solution that contains 0.1 M Pb2+, 0.1 M Hg2+ and 0.1 M Fe3+. You would like to separate these ions by precipitation. For quality purposes, the precipitation of each…

3) You have the following stock solutions and solid chemicals in your lab: 1.5 M

3) You have the following stock solutions and solid chemicals in your lab: 1.5 M NaCl 0.50 M Tris buffer, pH 8.0 25 mg/ml Bovine serum albumin (BSA) MgCl, (solid, anhydrous) MW = …

3) You mix together in the proper manner the following VOLUMES: 0.0100 M Potassi

3) You mix together in the proper manner the following VOLUMES: 0.0100 M Potassium iodide...14.7 mL 0.0010 M Sodium thiosulfate...5.6 mL Distilled water...22.7 mL 0.0400 M Potassi…

3) a) One bromine atom is in an axial conformation, while the other bromine atom

3) a) One bromine atom is in an axial conformation, while the other bromine atom is in an equatorial conformation b) This compound should be properly called trans-1,3-dibromocyclo…

3) a) lf the dihydrogen complex (left) shown below undergoes a reaction with 2 e

3) a) lf the dihydrogen complex (left) shown below undergoes a reaction with 2 equiv. Of KCa, the dihydride complex (right) is formed. What type of reaction is occurring to allow …

3) a) lf the dihydrogen complex (left) shown below undergoes a reaction with 2 e

3) a) lf the dihydrogen complex (left) shown below undergoes a reaction with 2 equiv. of KCa, the dihydride complex (right) is formed. What type of reaction is occurring to allow …

3) pH Buffer Question. You need to make IL of buffer solution with a pH of 5.3.

3) pH Buffer Question. You need to make IL of buffer solution with a pH of 5.3. You have 15.82 grams of pyridine (you can look up this species). Assume all activity coefficients =…

3) the following diagrams represent aqueous solutions of three different monopro

3) the following diagrams represent aqueous solutions of three different monoprotic acids, HA, HB, and HC. Water molecules have been omitted for clarity. Rank the conjugate bases …

3) three colorless solution in test tubesm whit no labels arein a test rack on t

3) three colorless solution in test tubesm whit no labels arein a test rack on the laboratory bench. lying beside the test tubesare three labels, potassium iodide, KI, silver nitr…

3).The photosynthesis reaction is 6CO2 (g) + 6H2O (g) (Arrow) C6H12O6(s) + 6O2 (

3).The photosynthesis reaction is 6CO2 (g) + 6H2O (g) (Arrow) C6H12O6(s) + 6O2 (g). If the reaction requires 2.82 x 10^3 kJ/ mole of C6H12O6 formed: a.) How many grams of C6H12O6 …

3)A 100 mL sample of hard water is titrated with 22.4 mL of EDTA solution from p

3)A 100 mL sample of hard water is titrated with 22.4 mL of EDTA solution from problem 2. the same amount of MgCl2 is added as previously and the total volume of EDTA solution req…

3)A 100 mL sample of hard water is titrated with 22.4 mL of EDTA solution from p

3)A 100 mL sample of hard water is titrated with 22.4 mL of EDTA solution from problem 2. the same amount of MgCl2 is added as previously and the total volume of EDTA solution req…

3)TLC plates could be made of different particle size of silica. If one used a s

3)TLC plates could be made of different particle size of silica. If one used a smaller particle size of silica in the TLC plate, how would that effect the results of a TLC experim…

3)The condensed structural formula for the molecule shown in the figure is? http

3)The condensed structural formula for the molecule shown in the figure is? https://ecourses.tvcc.edu/courses/1/CHEM1412_S14_0203/ppg/d6/brg0001f391afb01b039/q16-1.png 1) C8H14O 2…

3)The data in the table below were obtained for the reaction: A + B ----> P Use

3)The data in the table below were obtained for the reaction: A + B ----> P Use this info for quest 3 and 4. 3) Write the rate law for this reaction 4) Calculate the magnitude …

3)The data in the table below were obtained for the reaction: A + B ----> P Use

3)The data in the table below were obtained for the reaction: A + B ----> P Use this info for quest 3 and 4. 3) Write the rate law for this reaction 4) Calculate the magnitude …

3)The following reaction, calculate H rxn(in kJ), S rxn(in J/K), and G rxn(in kJ

3)The following reaction, calculate Hrxn(in kJ), Srxn(in J/K), and Grxn(in kJ) at 25 C. NH4Cl(s)HCl(g)+NH3(g) 4) Electrons flow from right to left (anode to cathode). Anode=Cr(s) …

3)The thermal decomposition of acetaldehyde is a second order reaction CH3CHO->

3)The thermal decomposition of acetaldehyde is a second order reaction CH3CHO-> CH4+CO from the data shown below, calculate the average rate of change in the pressure of acetal…

3)The thermal decomposition of acetaldehyde is a second order reaction CH3CHO->

3)The thermal decomposition of acetaldehyde is a second order reaction CH3CHO-> CH4+CO from the data shown below, calculate the average rate of change in the pressure of acetal…

3, A student observes that a 126 mL dry flask with a foil cap weighs 50.162 g. T

3, A student observes that a 126 mL dry flask with a foil cap weighs 50.162 g. The student then adds 5 mL of an unknown volatile liquid and heats the flask in a boiling water bath…

3, Answer BOTH parts a) and b). a) Bond Bond enthalpy (A) F-F CI-CI Br-Br kJ mol

3, Answer BOTH parts a) and b). a) Bond Bond enthalpy (A) F-F CI-CI Br-Br kJ mol1 158 242 193 151 1-1 i) Rationalize the group 17 homonuclear bond strengths g table above identify…

3, When two immiscible solvents are mixed two layers form. Liquid-liquid extract

3, When two immiscible solvents are mixed two layers form. Liquid-liquid extractions commonly use organic solvents that are less dense than aqueous solutions and, therefore, form …

3, which of the following is NOT a characteristic of the chemical equilibrium, A

3, which of the following is NOT a characteristic of the chemical equilibrium, A + B the following best describes what an 6? Which of C + D? "equilibrium expression" is? A. it is …

3, working with standard values (Appendix C of text): (a) Appendix c lists the s

3, working with standard values (Appendix C of text): (a) Appendix c lists the standard entropy of both 1iquid and gaseous (b) Use this and other standard entropies to calculate a…

3,) Consider that the following half reaction is assigned a half cell voltage of

3,) Consider that the following half reaction is assigned a half cell voltage of 0.0o v Hig+2 (aq) + 2e' Hg (l) E" = 0.00 V When this half-cell is paired with each of the followin…

3,2,-2,1/2 3,2,1,0 4,2,1,1/2 2,3,1,1/2 3,0,0,1/2 0,2,0,1/2 2,1,-1,1/2 4,3,-4,1/2

3,2,-2,1/2 3,2,1,0 4,2,1,1/2 2,3,1,1/2 3,0,0,1/2 0,2,0,1/2 2,1,-1,1/2 4,3,-4,1/2 2,-2,-2,-1/2 3,3,-2,-1/2 2,2,1,-1/2 2,1,-1,-1/2 which one of these are valid? Part B))) Identify t…

3,980 2. Suppose that a student doing this experiment failed to dry the KHP befo

3,980 2. Suppose that a student doing this experiment failed to dry the KHP before using it to standardize the NaOH solution. (a) Would her calculated molarity of the NaOH solutio…

3- A binary system of species 1 and 2 consists of vapor and liquid phases in equ

3- A binary system of species 1 and 2 consists of vapor and liquid phases in equilibrium at temperature T, for which put = 1.24 bar ; Psat = 0.89 bar Assuming the validity of Modi…

3- An 8.68 gram sample of a mixture of aluminum carbonate and calcium carbonate

3- An 8.68 gram sample of a mixture of aluminum carbonate and calcium carbonate is placed in a vessel equipped with a massless, frictionless piston. The initial volume can be assu…

3- CN$(aq) + NH4+(aq) HCN(aq)+ NH3(aq) A solution is prepared with all reactants

3- CN$(aq) + NH4+(aq) HCN(aq)+ NH3(aq) A solution is prepared with all reactants at 0.45 M and all products at 0.25 M. a) Calculate G° and K (at 298K). b) Calculate Q and G and in…

3- State which one of the paired structures (A or B) is most stable. \"Briefly e

3- State which one of the paired structures (A or B) is most stable. "Briefly explain" your choice, and provide the resultant structures for each compound. In addition, provide th…