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Calculate the molecular weight of the phenol-formaldehyde (Bakelite) repeatini 73 amu 0 100 amu 88.7 amu...
Calculate the molecular weight of the phenol-formaldehyde (Bakelite) repeatini 73 amu 0 100 amu 88.7 amu 133 amu
Provide a general mechanism (with arrows) for the formation of Bakelite from phenol and formaldehyde (CH2O) in the presence of acid. In what way is this polymer different from nylon and polystyrene? How is it manifested in its physical properties?
9. Look up the structure of Phenol-formaldehyde (Bakelite). This structure can never be an elastomer...can you explain why? Can this solid yield graphite?
calculate the number average molecular weight of a
copolymer
erm Remmaining Time 13:27:41 Calculate the number-average molecular weight of a copolymer of butadiene and dimethylsilaxane in which 1/5 of the repeat units are butadiene, and the rest are dimethylsilacane. Assume the number-average degree of polymerization is 101.500. 8.01E6 amu 9.53E6 amu 7.12E6 amu O 6.66E6 amu Cuit & Save Back Question Menu SUbmit Assgnment
Difference in the molecular weight of formaldehyde compared to similar compounds—How does this difference affect properties (e.g., solubility) to change the range of uses?
References] The molecular weight of myoglobin is about 17,000 amu. What is the mass in grams of a single molecule of myoglobin? Mass g/molecule Submit Answer Try Another Version 10 item attempts remaining
Question 7 5 pts What is the formula weight of KCI? 74.55 amu 66.42 amu 0 36.00 amu 1386 amu
The molecular mass of propanoic acid is 75.1 amu . Calculate the molecular mass of methyl ethanoate, an isomer of propanoic acid. Express your answer with the appropriate units.
Calculate the average molecular weight of the following: 100 Kgmol of gas mixture containing 30% methane, 10% hydrogen and 60% nitrogen (all mol percent).
Polymers principles
Given the following information, calculate the number-average molecular weight, the weight-average molecular weight, and the molecular weight distribution: