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a) In terms of tensile strength melting point etc. how a cross does linked polymer compare with a non-cross linked polymer?
b) Depict a simple schematic diagram of linear polyethylene and cross linked polyethylene. chemical structure of ethylene is CH2 = CH2.
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?
What cell potential (V) would be expected under the following conditions?
a fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. use boyles law to calculate the
what purpose does sodium carbonate serve during the extraction of caffeine from tea leaves?
Answer the questions below with the data provided: 15 mL of 5% NaOH (w/v) is used to deprotonate the unknown carboxylic acid. The TBME is washed with an additional 10 mL of the NaOH solution and then 20 mL of water which are all combined.
For which set of values of DH and DS will a reaction be spontaneous (product-favored) at all temperatures
Consider a lake containing 39 ppb (parts per billion) of parathion, which has a log Kow = 3.8. If a sample of lake water was mixed with octanol, what is the expected concentration of parathion in the octanol?
suggest a procedure you could follow to determine whether it was necessary to use this solution as a reference or whether distilled water would have been just as satifactory
Calculate the pH of a solution prepared by mixing 20mL of .20M NH3 with 40mL of .10M HNO3 (Kb for NH3= 1.8 x 10^-5)
if the height of the mercury column in the leveling bulb is 30mm greater than that in the gas buret and the atmospheric
The Bradford assay is often utilized in place of the standard Biuret assay. Explain the general chemical mechanism of the Bradford assay as well as list the major advantages of this technique.
The IR spectrum of HCN shows 3 absorption bands at 3312 cm^-1, 2089 cm ^-1, and 712cm^-1. From this info alone can you deduce whether HCN is linear or not? Explain.
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