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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
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:
Pre-activity: The Hybrid and Molecular Orbital Models a)040-12. 1. Draw the Lewis structure for formaldehyde (CHO) in the box to the side, and label each bond as a or z. 2. Complete the table below to identify the valence orbitals for C, H and O in formaldehyde. O H C Where relevant, what is the hybridization of each atom? How many hybrid orbitals are present on each? What unhybridized atomic orbitals are present? Specify the number of each in parentheses....