[tekki]

Hi! Today I was doing my homework and I stuck on one exercise. I have to calculate the molecular weight of polypropylene, where n=320. Can someone help me and show me how can I calculate it? Here's the picture to this exercise.



I hope that someone can show me it! It'd mean the world to me!


EDIT: this is my attempt:

mC=12
mH=1
n=320

12*3+1*6=42u

42*320=13440

Answer: the molecular weight of polypropylene equals 13440

[Babcock_Hall]

It is a Forum Rule (see red link above) that you must show your attempt at answering a problem before we can help you.

[tekki]

oh, okay, so gimme a few second and I will post this here!

[tekki]

It is a Forum Rule (see red link above) that you must show your attempt at answering a problem before we can help you.

I updated my post

[Borek]

Very close, but technically incorrect.

What about the ends?

[tekki]

Is it gon' be 13440u? Or you meant something else?

[Borek]

Polymer chain doesn't start nor end with a sticking out unused bond.