Chemistry question and answers for August 06, 2023
- Q True/ FalseA. _____The emf of a voltaic cell can change withtemperature.B. _____A reaction with a negative value of ï„S and a positivevalue of ï„H at a given temperature is not...
- Q For the following reaction show all work:1. Give the oxidation number for each element in the followingequation.Fe2O3 (s) + CO (g) = Fe (s) + CO2 (g)a. Write the balanced...
- Q For the last step in your potential Nobel-prize winning cancercure drug you need 3-cyclopentyl-1-phenylhexan-3-ol, but nochemical company sells this particular alcohol. You, being thewonderful synthetic chemist that you are, figure...
- Q Compare and contrast Oxidative Phosphorylation andPhotophosphorylation. Write out at least 5 similaritites,differences, or some combinaion of the 2.
- Q Consider the following reaction at equilibrium.2H2O (g) + 2SO2 (g) <--> 2H2S (g) + 3O2 (g)What effect will adding more H2S have on the system?A) The reaction will shift in...
- Q Indicate whether the followingstatements are correct or incorrect, and justify your answer:a)The presence of more dislocationsincreases the yield strength of an annealed metal.b)Dislocation move more readily in asolid solution alloy...
- Q please match nitrogen from the phrase that best describesit:_Most abundant form of nitrogen_disrupts 03-o2 equilibrium and is a greenhouse gas_most oxidized form of nitrogen1. NO2. N23. N2O4.NO35.HNO2
- Q Compare and contrast SDS-PAGE and Native-PAGE. Discuss thechemical and mechanistic similarities and differences between thetwo. Discuss why a scientist would prefer one method over theother.
- Q A25.0 mL sample of 0.100 M NaOH is titrated with a 0.100 M HNO3solution. Calculate the pH after the addition of 0.0, 4.0, 8.0,12.5, 20.0, 24.0, 24.5, 24.9, 25.0, 25.1,...
- Q An equilibrium mixture of N2, H2 and NH3 at 700K contains 0.036MH2 and 0.015M H2. At this temperature, Kc for the reationN2(g)+3H2(g) <> 2NH3(g) is 0.29. What is the concentration...
- Q Find Delta G^o for the following reaction, using delta Hf^o andS^o values.MnO2(s) + 2CO(g) -> Mn(s) + 2CO2(g)
- Q Which scenario will result in the greatest decrease in energyfor the system?(a) The system releases 234 cal of heat and has 430 J of workdone to it.(b) The system gains...
- Q Will all haloalkanes that have ethane as the parent chain nothave numbers in the name? Also, could there be a haloalkane withmethane as the parent chain. If so, could you...
- Q 1 a) What health benefit is derived by adding fluoride totoothpaste or drinking water? What are the possible hazards?b) What is the present recommended concentration of fluoride inToronto’s tap water...
- Q drawing a Lewis structure of compound, what are someways that I can determine if it's polar or nonpolar?Without calculating the electronegative difference,how can I look at a structure and determine...
- Q Calculate the mass (in  g) of each sample.6.31×1020 SO3 molecules​2.4×1022 H2O molecules​4.6×1025 O3 molecules​9.85×1019 CCl2F2 molecules​
- Q Ifa scuba diver's lungs have a normal capacity of 4.9 L at sea level(1.0 ATM), what would be the volume of her lungs if the pressure ata depth of 50...
- Q Define the terms accuracy and precision. Give examples whichillustrate the difference between terms.
- Q Ca + 2 H2O ------> Ca(OH)2 +H2If we have 4 moles of Ca and 4 moles of water – how muchCalcium Hydroxide can we make? What would be the limiting...
- Q Need molecular equations (Ionic and net when needed) for thefollowing:Calcium chloride and sodium carbonateCopper (II) Nitrate and Sodium HydroxideCopper (II) Nitrate and Sodium SulfateMagnesium Chloride and Sodium SulfateMagnesium Chloride and...
- Q Assignment due soon! Please hurry! Aaaaah!!You have created a galvanic cell in order to perform thefollowing UNBALANCED reaction. First, balance the reaction. Br- +Ag+ → Br2 + AgPart 1: You...
- Q Aqueous hydrochloric acid HCl will react with solid sodiumhydroxide NaOH to produce aqueous sodium chloride NaCl and liquidwater H2O . Suppose 0.36 g of hydrochloric acid is mixed with 0.164g...
- Q If given the spectra for 2-Heptanone and Heptanal, how could youtell which is which?If given the spectra for 2-Heptanone and Heptanoic Acid, howcould you tell which is which?If given the...
- Q 4) The equilibrium constant for the reaction shown below is 4.63x 10-3 at 527oC.                       COCl2(g) ó CO(g) + Cl2(g)a)Write the equilibrium constantexpression in terms of the chemical concentrations.b)What is the equilibrium...
- Q Calculate the pH of buffers based on the recipesA: 17.91g Na2HPO4*12H2O1.7mL 1M NaOH998.3mL H2O----------------------------------------------B: 13.16g citric acid monohydrate25mL 1M NaOH998.3mL H2O----------------------------------------------C: 0.49g NaH2PO4*H2O12.49g Na2HPO4*12H2O1L H2O----------------------------------------------D: 17.91g NaH2PO4*12H2O1L H2O----------------------------------------------CompoundMWpKa if ionic...
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