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- Estimate Ecell in volts. Cu(s)|Cu2+(3.00x10-4)||Ag+(0.15M)|Ag(s) Eocell=+0.620 0.5 0.8 0.7 0.600 0.9Given: F2(g) + 2 e- ⟶ 2 F-(aq) Eo = +2.87 v Hg2+(aq) + 2 e- ⟶ Hg(l) Eo = +0.87 v Calculate ΔGo for: Hg(l) + F2(g) ⟶ Hg2+(aq) + 2 F-(aq) ΔGo = -nFEo F = 96500It is estimated that the net amount of carbon dioxide fixed byphotosynthesis on the landmass of Earth is 5.5 x 1016 g/yrof CO2. Assume that all this carbon is converted into glucose.(a) Calculate the energy stored by photosynthesis onland per year, in kJ. (b) Calculate the average rate of conversionof solar energy into plant energy in megawatts, MW11W = 1 J/s2. A large nuclear power plant produces about103 MW. The energy of how many such nuclear power plantsis equivalent to the solar energy conversion?
- For the dissolution of LiCl in water, ΔHsoln = -37 kJ/mol.Which term would you expect to be the largest negativenumber: ΔHsolvent, ΔHsolute, or ΔHmix?111.1Ms = ? ks show work, report sig figs and unitsAn experiment was conducted to determine the effect of glucose on the freezing point of water. Experimental data showed thatthe freezing point depression of water in solution was –2.6°C when 1.0 g of glucose was dissolved in 10g of solvent. Calculatethe expected freezing point for such solution and compare the expected freezing point to the value found experimentally. Give aplausible explanation for any discrepancies. (M.W. of glucose= 180.16g/mol; i=1). Show all your work.
- Computers are not supposed to be in very warm rooms. The highest temperature tolerated for maximum performance is 308 K. Express this temperature in C and F.What is the Molecular weight of a certain volatile liquid which is placed in 225 g flask which has total capacity volume of 252.17 mL. After the liquid was heated to 96.7 oC the gass volatilized and the weight of the flask measure 227.33g. What is the could be the MW of the volatile sample?10.11/ A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy is heated to 250°C (480°F), at which temperature it is entirely an a-phase solid solution . The alloy is to be melted to the extent that 50% of the speci- men is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composi- tion while holding the temperature con- stant. (a) To what temperature must the speci- men be heated? (b) How much tin must be added to the 1.5-kg specimen at 250°C to achieve this state? 10.15) A magnesium-lead alloy of mass 5.5 ka consists of a solid a phase that has a compo- sition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350°C (660°F). how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? 10.27 A hypothetical A-B alloy of composition 55 wt% B-45 wt% A at some temperature is found to consist of mass…
- (II) A 1.0-L volume of air initially at 3.5 atm of (gauge)pressure is allowed to expand isothermally until the pressureis 1.0 atm. It is then compressed at constant pressure to itsinitial volume, and lastly is brought back to its originalpressure by heating at constant volume. Draw the processon a PV diagram, including numbers and labels for the axesCarbonic anhydrase of erythrocytes (Mr 30,000) has one of the highest turnover numbers known. It catalyzes the reversible hydration of CO2:This is an important process in the transport of CO2 from the tissues to the lungs. If 10.0 μg of pure carbonic anhydrase catalyzes the hydration of 0.30 g of CO2 in 1 min at 37 °C at Vmax , what is the turnover number (kcat) of carbonic anhydrase (in units of min −1 )?An aqueous solution of sucrose (C12H22O11) is prepared by dissolving 7.4045 g in sufficient deionized water to form a 100.00 mL solution. Calculate the molarity of the solution. Do you mind showing work? I would assume that (given) gram weight (times moles present/divided by mole(s) of compound) then divided - again by compound weight will give a percentage, then divded by the .....that's where I'm a little lost. thanks