Subject: Physical Chemistry · Chapter: Polymer Chemistry · Topic: Molecular Weight Averages · Exam: NET DEC 2014 · Marks: 2 · Difficulty: Medium
A sample experiment revealed that PVC formed in the medium has $\left(\mathrm{M}_{\mathrm{n}}\right)=13$, and $\left(\mathrm{M}_{\mathrm{w}}\right)=16$, where $\left(\mathrm{M}_{\mathrm{n}}\right)$ stands for the number average molar mass and $\left(\mathrm{M}_{\mathrm{w}}\right)$ for the weight average molar mass. The variance of $\mathrm{M}_{\mathrm{n}}$ will then be