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- C) The instantaneous velocity of a molecule tells you little about the time it takes a molecule to move cellular distances because the molecule's trajectory is constantly altered by collisions with other molecules in solution. The average time that it takes for a molecule to travel “x" cm by diffusion in three dimensions is given by t=x/6D, where t is time in seconds, and D is the diffusion coefficient, which is a constant that depends on the size and shape of a molecule. Glucose and myoglobin have diffusion coefficients of 5 X 10°cm?/sec and 5 X 10° cm?/sec, respectively. Calculate the average time that it would take for a molecule of glucose and a molecule of myoglobin to diffuse a distance of 25 um, an approximate width for a mammalian cell.The atmospheric ratio of peroxyacetic nitric anhydride (PAN) to PAN + inorganic nitrite varies from less than 0.1 to 0.9. High values of the ratio are associated with photo chemically aged air masses, situations where precipitation has recently occurred, and situations were unusually high nighttime nitrogen oxide concentrations are found. What do these observations tell us  about the factors affecting the relative rates of formation and removal of nitrogen oxide compounds?What is the value for the w (water potential) of a cell when placed in a hypertonic saline solution of 0.40 M under standard atmospheric pressure (1.0 MPa) and at a room temperature of 25° C? [Assume that the cell and solution , (solute potential) are at equilibrium. Use 0.08314L bar K mol as the gas constant (R)]
- The simple form of |Hoff equation is: II = [B]RT In this equation the [B] is the molar concentration of solute. So: n m [B] = v MV = cg /MA Where c, the mass concentration of the solute is in the total volume of solution and M, is the molar mass of the solute. This equation can be replaced in the previous one to get: RT II = MA In this equation molar mass of given solute can be detemined from the slope of the II vs Cz plot. This equation applies only to solutions that are sufficiently dilute to behave as ideal-dilute solutions. In the case of non-ideal solutions, however, the extended formula is: II = [B]RT{1+ k. [B] + n. [B]² + ...} Biological macromolecules dissolve to produce solutions that are far from ideal, but we can still calculate the osmotic pressure by assuming that the van't Hoff equation is only the first term of a lengthier expression: II [B]RT(1+ b. [B]) II = RT + bRT. [B] [B] II = RT + bRT./M. */Ma п RT ÞRT Ca MA MA In this equation molar mass of given biomolecule can…The equation describing the linear relationship between hemoglobin concentration and Absorbance at 520 nm is y=0.0523x + 0.011. You can see this graph in your lab manual in the blood lab. If the absorbance value is 0.4, calculate the % Hemoglobin in whole blood You Answered 31.6% 17.95% 0.03% Correct Answer 7.43%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…
- Calculate the enthalpy of vaporization at the normal boiling point (760 mmHg) of the liquid(water, boiling point of 100 celsius).You have a mixture of the three molecules shown below that you are using Gas Chromatography to separate. Based on trends discussed in class, and using what you know about IMFS and Gas Chromatography, match up the three peaks in the GC scan to the molecules. Carefully read the ordering of peaks in the answer, this may not match how they are labeled in the diagram. Ignore differences in peak height and/or width. HO :0: :O: А C 3 10 20 30 50 60 70 Retention Time, minThe temperature dependence of the vapor pressure is given by the equation: ΔΗ RT Inp = In A – Where: p= vapor pressure T = temperature A = pre-exponential constant AHvap = enthalpy of vaporization In order to solve for the enthalpy of vaporization, AHvap, you must: Step One Add the same expression to each side of the equation to leave the term that includes the variable by itself on the right-hand side of the expression: (Be sure that the answer field changes from light yellow to dark yellow before releasing your answer) ΔΗ RT + Inp = + In A Drag and drop your selection from the following list to complete the answer: 1 1 In In A - In A K
- A Lab Data Did you correctly calculate the diffusion rate? Time (min) 10 20 30 Time (min) 0-10 0-20 0-30 Diffusion Spot Diameter 1 Crystal (mm) 15 15 18 Rate of Diffusion for 1 Crystal (mm/hr) 90 45 36 Diffusion Spot Diameter 3 Crystals (mm) 0-15 0-15 0-18 Rate of Diffusion for 3 Crystals (mm/hr) 270 135 108 How to Measure Diffusion Spot Diameter 6 Crystals (mm) 0-15 0-15 0-18 Rate of Diffusion for 6 Crystals (mm/hr) 540 270 216 Rate [mm/h] = (diameter [mm] / time [min]) x 60 [min - X V LABELS1. Qualitative thinking: For diffusion, it is important to understand the differences between diffusion rate and diffusive flux. a. Define diffusive flux and diffusion rate and write their equations based on Fick's first law. b. Write an equation that relates the two and show how the units balance on each side. c. Fill in the what happens to diffusive flux and diffusion rate (increases, decreases or stays the same) when the variables in the left column changes as noted: Variable Concentration difference, AC Diffusion distance, Ax Diffusion area, A Diffusion coefficient, D Change Increases Increases Increases Increases Diffusive flux Diffusion rate4) An alpha source emits radiation into tissue. The mean range is 0.00645 cm. Assume the tissue has the same properties as water. (a) What is the mean range in air? (b) What is the energy of the source? (c) Find the position of forward side of the straggling zone if the (HWHM) is 0.15 cm. (d) What is the extrapolated range?