Q
molar mass of polypropylene
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Polypropylene (PP) is a thermoplastic polymer used widely in various applications, from packaging materials to automotive parts. Its repeating unit has the formula C3H6, deriving from propylene monomers. To calculate the molar mass of a single monomer unit, we consider the atomic masses of carbon (C) and hydrogen (H), which are approximately 12.01 g/mol and 1.01 g/mol, respectively. Thus, a polypropylene monomer unit has a molar mass of (3 * 12.01) + (6 * 1.01) = 42.08 g/mol. However, a complete polypropylene chain consists of thousands of these repeating units. Therefore, the molar mass of individual polypropylene molecules can vary widely, typically in the range of tens to hundreds of thousands of g/mol, depending on the polymer's degree of polymerization, which is the number of repeating units in the chain.
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