Suppose you have a styrofoam insulating sphere with volumetric charge density. p. is 85.1 nC/m. If the diameter of the sphere is 1.33 melers, whất 8 the electric field a distance 0.130 meters from the center of the sphere? QUESTION 5 Two particles have a charge of -48.7 nanocoulomb and 68.3 nanocoulomb and are separated by 2 meters. What is the electric potential in the middle of the two particles in volts?
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- The Thermal conductivity of rock salt measured at a temperature of 500 degrees C what value would be the closest ?For ferrocene (C10H10Fe) the enthalpy of sublimation is 73.2 kJ/mol and the entropy of sublimation is 243 J/mol.K. What is the sublimation temperature of ferrocene in degrees Celsius?What would be the free-energy change generated by the import of one mole of Na+ from a concentration of 10 mM to 150 mM with a membrane potential of −25 mV at 37°C? Give your answer without units and to one decimal place. F = 96.5 kJ/V•mol
- a A metal that is in the liquid phase at room temperature. SiO2 b A compound that forms a network solid composed of covalently bonded atoms. CO2 c A gas that will dissolve in water due to dipole-Induced dipole forces. KNO3 d The solid-liquid equilibrium line on the phase diagram of this compound has a negative slope. Poly-ethylene ( a plastic) e A solid substance at STP, in which the particles are held together by Induced dipole-induced dipole forces. Graphite f A substance that will dissolve in water due to hydrogen bonding. H2O g A covalent network solid that has good electrical conductivity. NH3 h An amorphous solid. HgA cart that weighs 15 kg is rolling down a hill with a velocity of 4.2 m/s2. What is the kinetic energy of the cart?Give me the following: Half reactions Standard cell potential/cell potential solution Standard cell potential/ cell potential final answer Standard Gibbs free energy/Gibbs free energy solution Standard Gibbs free energy. Gibbs free energy final answer K/Q solution K/Q final answer
- The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. A . What is qH2O in Joules? B. What is qdissolution in Joules? C. What is the ΔHdissolution in kilojoules per mole?3. a) An aqueous solution is 3.50% by mass potassium bromide, KBr, and has a density of 1.02 g/mL. The molality of potassium bromide in the solution is _________m. b)An aqueous solution of magnesium nitrate has a concentration of 0.474 molal. The percent by mass of magnesium nitrate in the solution is _________%. c)An aqueous solution of cobalt(II) bromide has a concentration of 0.153 molal. The percent by mass of cobalt(II) bromide in the solution is _________%.Calculate the molarity (M) of a 65% (w/v) copper sulfate solution (m.w. = 160.0 g/mol).
- If the osmotic pressure of a 7.96×10-2-M aqueous solution of Fe2(SO4)3 was found to be 8.71 atm at 20°C, what would be the "observed" van't Hoff factor? Use the above van't Hoff factor to predict the freezing point of this solution.Note that the corresponding molality would be 8.25×10-2 m, given that the density of the solution is 0.997 g/cm3. °C Use the above van't Hoff factor to predict by how many degrees the boiling point of this solution will be elevated above that for pure water.The material to be heated is in a long, cylindrical tube, and is viscous enough that any flow inside the tube can be ignored, i.e. the heating is by conduction alone). Also, consider the glass of the tube to be very thin so its thermal resistance can be ignored. The tube diameter is 1 cm and the properties of the material are the same those of water, given by 0.64 W/m*K, 1000 kg/m3, and 4180 J/kg*K, for thermal conductivity, density, and specific heat, respectively. The water bath temperature is 65 °C, and the initial temperature of the material is 27 °C. Without the agitation of the water bath, the heat transfer coefficient can be considered to be 128 W/m2*K. Considering the tube to be a long cylinder, how long does it take for the coldest point to heat up to a temperature corresponding to 99% of the total possible temperature increase? If the surrounding how water is agitated using a stirrer, leading to a considerably large surface heat transfer coefficient, how long does it…Describe the preparation of the following solutions include all mathematic calculations and equipment of the laboratory needed A.500 mm of a solution of KNO 1.50 M B. 150 g of a solution 5.0% of NaC2H3O2 C. 500 mm of a solution of NaOH 0.50 M from a solution of NaOH 6.0 M