48. What term is used to describe the decrease of stress at constant length with time?

49. Briefly describe the Maxwell model and the Voigt–Kelvin model.

In a titration 34.20 mL HI, 21.78 mL of 0.250 M LiOH was needed to reach the equivalence point.

a.) What is the reaction equation for this reaction?

b.) How many moles of LiOH were added during the titration?

c.) How many moles of HI were present in the original sample?

d.) What was the HI concentration in the original sample?

Please show all steps!!! This is for my test's study guide

36. What would be the composition of the product obtained by the cationic low-temperature polymerization of a solution of isobutylene in ethylene?

44. Below the glass transition temperature, a material should behave in what manner?

31. What is the initiator in the polymerization of isobutylene? 


32. What is the general name of the product produced by cationic initiation? 


33. What reactant besides the monomer is present in cationic chain propagation reactions? 


how do you find the equivalent positions for a monoclinic space group for example a C2/m space group?

Q-) A 25 ml of diluted bleach solution was titrated with 19.5 ml of 0.3 M of sodium thiosulfate (Na₂S₂O3), if the dilution factor = 5, then the % of NaOcl in org. bleach equals ( density of original. bleach= 1.08 g/ml) ??

A 29.0-g sample of NaOH is dissolved in water, and the solution is diluted to give a final volume of 1.60 L. The molarity of the final solution isA) 18.1 M B) 0.453 M C) 0.725 M D) 0.0552 M E) 0.862 M

The surface tension of pure water is 72 dyne/cm at 20C. You are provided with two surfactants, A and B. A 1% solution of surfactant A reduced the surface tension of water to 35 dynes/cm and a 1% solution of surfactant B reduces the surface tension to 44.5 dynes/cm. Now, let's assume that you are making two foams using surfactants A and B. The total interfacial area of the foam in both cases is 600 cm^2. What is the interfacial energy difference between these two foams? Which one will be more stable?

In general, why are atoms that are farther to the right on the periodic table more electronegative?  Additionally, why does the size of the atom affect its electronegativity?

4.3120 g KNO3, 1.2345 g of CuCl2*2H2O, and 0.5678 g of BaCl2*2H2O are used to prepare K2CuBa(NO2)6. Calculate the theoretical yield of K2CuBa(NO2)6 in grams.

Solid Iron (II) Oxide reacts with Solid elemental iron and oxygen gas to create Iron (III) Oxide. Calculate ∆S​ * and determine the value for K of this reaction at 25C.

Using an argument based on intermolecular forces, explain why there is a surface tension that develops between air and water? How would a surfactant disrupt this tension?

0.170g of caffeine is dissolved in 10.0mL of water. The caffeine is extracted from the aqueous solution three times with 5.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6 between methylene chloride and water.

Please explain throughoutly. This is my first time working with extraction question

Most transition metal complex ions with octahedral geometry follow 18-electron rule. explain why it is so using the molecular orbital diagram.

some transition metal with d8 electron configuration ten to form square planar geometry rattan than octahedral geometry. explain the reason using the molecular orbital diagram.