Subject: Physical Chemistry · Chapter: Polymer Chemistry · Topic: Polymer Chemistry – General · Exam: NET JUNE 2017 · Marks: 2 · Difficulty: Medium
A polydisperse polymer sample has ten molecules of molar mass $20,000 \mathrm{g} \mathrm{mol}^{-1}$ and fifteen molecules of molar mass $10,000 \mathrm{g} \mathrm{mol}^{-1}$. The number-average molar mass $\left(\mathrm{g} \mathrm{mol}^{-1}\right)\left(\overline{\mathrm{M}}_{\mathrm{n}}\right)$ of the sample is