Question 75 - The molecular weights M in kg / mol of 3 different monomers a, b and c in a polymer are Ma = 14, Mb = 16 and Mc = 18. The fraction of polymer chain X of 3 different monomers a, b and c in a polymer are Xa = 0.5, Xb = 0.3 and Xc = 0.2. (i) Calculate number average molecular weight by using the formula Ma Xa + Mb Xb + Mc Xc. (ii) Calculate weight average molecular weight by using the formula (Ma Xa Ma + Mb Xb Mb + Mc Xc Mc) / (Ma Xa + Mb Xb + Mc Xc). (iii) Calculate the polydispersity by using the answer in (ii) divided by answer in (i). (iv) If the molecular weight of repeat unit is 12, calculate the degree of polymerization by using the formula (Ma Xa + Mb Xb + Mc Xc) / (molecular weight of repeat unit).

1 Answers  

---

What are the some common problems associated with dilute phase pneumatic conveying?

0 Answers  

---

plz somebody send me the latest placement papers of hpcl graduate trainee post.....at bikash.mallick1@gmail.com

0 Answers  

---

What are some good strategies for curing tube vibration in shell and tube exchangers?

0 Answers  

---

what is the difference between material balance and mass balance

4 Answers  

---

ACCOUNTING AND FINANCIAL ENGINEERING - EXAMPLE 34.6 : In a random walk, a stochastic process starts off with a score of A. This is a score for a chemical engineering test. At each discrete event, there is probability p chance you will increase your score by B and a (1 - p) chance you will decrease your score by C. The event happens T times. Let D = expected value of score. (a) Form an equation of D as a function of A, B, C, T and p. (b) Find the value of D if A = 60, B = 1, C = -1, T = 50, p = 0.5.

1 Answers  

---

Hi, I want to validate an analytical procedure of a specified impurity, but this impurity is unavailable for me. can I use the API instead of impurity in the linearity test? in Which reference can I find such information?

0 Answers   Pharma,

---

types and working of compressor

1 Answers   IOCL,

---

What is a good method of minimizing shell side pressure drop in a shell and tube exchanger?

0 Answers  

---

Explain how can you keep our seawater used for heat rejection clean before entering our heat exchangers?

0 Answers  

---

How does a chemical get ignited without external heat source on reaching its auto ignition temperature

1 Answers  

---

What is the purpose of capacitor?

0 Answers  

---