last q continue:..\"the rings are \"flexible\" because of the alternating patter
ID: 1046034 • Letter: L
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last q continue:.."the rings are "flexible" because of the alternating pattern of single and double bonds."
Q: A segment of the elastomer polyisoprene is shown below. What is the formula weight of the repeating unit? CH3 CH3 CH3 ?? ? -CH2 H2C-CH2 H2C-CH2 H2C O 54 g/mol O 68 g/mol O 82 g/mol O 204 g/mol Q: Conaider the polymers shown below. Which one'e) have the most polar bonds with carbon? ?? O Option 1 Option 2 O Option 3 Q: Terephthalic acid (used to make PET and Kevlar) and Bisphenol A (used to make polycarbonate and epoxies) have aromatic rings in their structure Which one(s) of the following statements is true about these aromatic rings. 3 The rings eshibit symmetry The rings are flat with the carbon atoms in a plane D The rings are'rigid" because of the atemaing partem of sngle and doub bonds.Explanation / Answer
1. Formula weight is the sum of weights of all atoms appearing in the formula.
The repeating unit is- (CH2)CH=C(CH3)-CH2
molecular weight is 68g/mole
2. The most bonds with C is found in option 3 since it has most number of C-F bonds, due to large electronegativity difference, the bond is polar in nature.
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