If a single molecuke of stearix acid covers an area of 0.21nm^2 how many stearic acid milecukes will it rake to cover the surface area if the petri dish
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- At an air-water interface, fatty acids such as oleic acid liein a one-molecule-thick layer (monolayer), with the heads in thewater and the tails perpendicular in the air. When 2.50 mg of oleic acid is placed on a water surface, it forms a circular mono-layer 38.6 cm in diameter. Find the surface area (in cm²) occu-pied by one molecule (of oleic acid M=283 g/mol).You make a calibration curve using dilute concentrations of dye and determine the equation of the line is y = 7.325 x. If the pathlength of the machine you are using is 1 cm, what is ε in Beer’s law for this solute? What are its units?You are required to prepare 5 L of a solution containing 1.000 x 103 mol/L of Cu2"(aq). Which of the following procedures would produce an appropriate solution? O Dissolve 0.0636 g of copper metal in nitric acid, add to a 5.000 Lvolumetric flask, dilute to the mark with deionized water and mix well. O Dissolve 1.248 g of CuSO.5H,0(s) in deionized water, add to a 5.000 L volumetric flask, dilute to the mark with deionized water and mix well. Dissolve 0.250 g of CUSO,.5H,O(s) in deionized water, add to a 5.000 L volumetric flask, dilute to the mark with deionized water and mix well.
- What is the main difference between molecular diffusion and mechanical dispersion in terms of contaminants moving through unsaturated and saturated groundwater?KMnO4 and Na2C2O4 solutions were used in the reactions that took place in a back titration to determine the amount of H2O2 in a sample. Calculate the concentration of H2O2 in the sample (w / v) as% by making appropriate assumptions for the volumes and normality of all these solutions.逐步解决 不使用人工智能出色完成工作 非常感谢您的支持 SOLVE STEP BY STEP IN DIGITAL FORMAT DON'T USE AI | DON'T USE AI | DON'T USE AI | DON'T USE AI | 2. An ethyl alcohol solution that is 75% alcohol by weight is to be used as a bactericide. The solution is to be prepared by adding water to a 95% ethyl alcohol solution. How many grams of each should be used to prepare 400 grams of the bactericide?
- 4. If the amount of solvent was doubled to 200 grams, the solubility would: * O increase O decrease Ostay the sameThe ingredients in herbicides and pesticides must be carefully monitored. Arsenic in a pesticide sample was precipitated as MgNH4AsO4 (molar mass = 181.25 g/mol). This was heated to form the more stable Mg2As2O7 (molar mass = 310.45 g/mol). Based on the following data, what is the numeric value of the gravimetric factor for the sample?You make a calibration curve using dilute concentrations of dye and determine the equation of the line is y = 7.325 x. If the pathlength of the machine you are using is 1 cm, what is in Beer’s law for this solute? What are its units?
- a solution containing 4.20x10^23 molecules/m^3 of protein is separated from pure water by a membrane 2.98 think the diffusion coefficient of the proteins through the membrane is 3.30x10^-18m^2/s. on average how many molecules cross 0.0260 of this membrane each secondDetermine the distance traveled by the solvent if the solute travels 3.1 cm. The weight of the analyte measures 0.984 mg with an Rf value of 0.647. Note: Express answers up to TWO decimal places. Distance traveled by the solvent = cm(a) A solution of 20.91 % by weight H₂SO4, has a specific gravity of 1.150. What is the normality of this solution? (b) Water is added to dilute this solution to a solution of 3.03% by weight H2SO4 (SG=1.020). What is the new normality of the resulting solution and how were they mixed? (Assume 100 mL of the original solution was used.)