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).what is the correct unit next to the number 1000? Use dimensional analysis for the answerYou 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.
- 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.4. If the amount of solvent was doubled to 200 grams, the solubility would: * O increase O decrease Ostay the same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?
- An empty flask with a mass of 90.09g was filled with ethanol (CH3CH2OH) to give a total mass of 97.87g. What volume (in microliters) of ethanol is present in the flask? dethanol = 789 kg/m^3 I'd like to see all the steps involved so I can understand how to arrive at the solution.A U-Tube is divided into left and right compartments by a membrane that exclusively allows water to pass through but not any dissolved particles. Initially, the water level is equal on both sides. Then. the following compounds are added to each compartment: Left compartment: 0.50 mol calcium nitrate and 1 mol of glucose(C6H11O6) Right compartment: 0.75 mol maltose (C12H22O11) and 0.75 mol AlPO4 Select the one statement below that is TRUE. a)Water will stop flowing across the membrane b)The right side compartment will have a higher osmotic pressure c)There will be no change in the water level on either side because water always flattens out d)The water level on the right side will be higher e)The water level on the left side will be higherThe 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?
- 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 = cmSpecify how the principle of constant proportions can be used to determine seawater salinity by measuring only one dissolved component.