Can you describe the main pathways (ingredient class or method) for modifying the rheological properties and adding viscosity / yield to a surfactant cleansing system (shampoo)? What would you be doing to the micelle and why would it thicken?

What is the main difference between molecular diffusion and mechanical dispersion in terms of contaminants moving through unsaturated and saturated groundwater?

the addition of surfactant molecules (CMC: critical micelle concentration) select one or more

Which elements or groups are necessary for hydrogen bonding? Does nylon contain these elements or groups

. These resins are organic polymeric networks that contain functional groups that are permanently attached to the resin. One such functional group is sulfonic acid, -SO3H. When placed in water, the resin (being a large organic molecule) will not dissolve. However, the ionic functional groups become hydrated and the resin will swell as it takes up waters of hydration. The resin may then be thought of as a solid solution mixture with the functional groups being "dissolved" but the polymer remaining as a solid. The hydronium ion (H3O+) associated with acidic functional groups like sulfonic acid will dissociate just as it would if the acid were free of the resin. If other cations such as Cu2+ or Na+ are added to the resin, an ion-exchange reaction can occur:  . Note that one H+ is released for each positive charge bound to the resin.  Since the resin exchanges a hydrogen ion for a sodium ion in this reaction, sulfonic acid resins are called cation-exchange resins. Equilibrium constants may…

Can you answer first 2 questions

Intestinal epithelial cells pump glucose into the cell against its concentration gradient using the Na+-glucose symporter. Recall that the Na+ concentration is significantly higher outside the cell than inside the cell. The symporter couples the "downhill" transport of two Na+ ions into the cell to the "uphill" transport of glucose into the cell. If the Na* concentration outside the cell ([Na*lout) is 149 mM and that inside the cell ([Na*]in) is 21.0 mM, and the cell potential is –54.0 mV (inside negative), calculate the maximum energy available for pumping a mole of glucose into the cell. Assume the temperature is 37 °C. kJ What is the maximum ratio of [glucose];n [glucose]out AGgluc = mol that could theoretically be produced if the energy coupling were 100% efficient? 3.5 x 10–4 7.96 2900 1.13 O O O

4g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil is contained in 30 g of the mixture? (c) If the specific gravity of the mixture is 0.781, what are the percent w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?

Only water or dilute aqueous solution or non toxic chemicals may be disposed of down the drain with copious water     true   false

if 5 mL 10 % v/v 1,6-Diaminohexane in 3% Sodium Hydroxide and 10 mL 2% v/v Sebacoyl Chloride in Hexanes is used to make nylon6,10. If each dimer is 20 angstroms in length, calculate approximately how long (in feet or miles) a strand of nylon can be formed