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Kevlar (C14H10N2O2) is used in various applications from tires to body amor due to its high strength-to-weight ratio. The polymer is produced from the monomers paraphenylene diarnine (C6H8N2) and terephthaloyl chloride (C8H4Cl2O2) by the following reaction:
(a) Who type of polymerization does the above reaction represent?
(b) Assuming 100% efficiency, calculate the weight of terephthaloyl chloride required to completely combine with 1 kg of paraphenylene domino.
(e) How much Kesler is produced?
What is the FW of the acid. What are the pKa1and pKa2 values for the acid. What should the pH be at halfway to the 2nd equivalence point of the titration
Predict the electron configuration of an octahedral d4 complex with (a) strong field ligands and (b) weak field ligands, and state the number of unpaired electrons in each case.
After 79.0 min, 35.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics
The density of a human body can be approximated by the density of water, which is equal to 1.000 x 103 kg/m3. What volume will a 185 lb person occupy in liters
A 150.0-g sample of metal at 80 degree celsius is added to 150.0g of H[2]O at 20.0 degree celsius. The temperature rises to 23.3 celsius. What is the specific heat of the metal [specific heat of h[2]o is 4.18 j(g degree celsius)
Equal volumes of H2 and O2 are placed in a balloon and then ignited. Assuming that the reaction goes to completion, which gas will remain in excess? 2H2 + O2 → 2H2O
the mass of a box containing 1000 washers. The mass is 0.2932 kg. What is the mass of a single washer in milligrams? Write your answer as a decimal.
1.which of the following is an l-aldotetrose?2. which of the following is a d-aldotetrose?3. which structure is
A catalyst decreases the activation energy of a given reaction by exactly 15 kJ/mol. By what factor does the reaction rate increase at 25oC when the catalyst is used
The solubility of CaSO4 in pure water at 0.0 C is 1.13 gram per liter; what is the value of solubility product
Calculate Delta mixG, Delta mixS, and Delta mixH for mixing 150.0 g of benzene with 200.0 g of toluene at 20 degree C and 1 atm.
at 700.degc the total pressure of the system is found to be 3.45 atm. if the equilibrium constant kp is 1.52 calculate
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