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 1878
What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?
How does a coal power station produce electricity?
how can i calculate increase electrical signal power expected at the photodiode detector output given 2 optical loss coefficients and the distance covered using multimode.thank you.
How to derive detailed design of Suitable bus Bar for 100A for 6.6KV?
how is capacitor bank look like
I CLEARED THE MTNL WRITTEN EXAM, CAN U PLEASE POST THE INTERVIEW QUESTIONS...... I AM FROM ELECTRONICS AND COMMUNICATION BACK GROUND AND THE TYPE OF INTERVIEW? and give the reply to sridhert@rediffmail.com
Explain Continuous and Discrete signals?
State some of lmo importance.
what is the minimum reinforcement provided in beams,footings,slabs? what is the minimum soil bearing capacity to design a multistorey building
how meny typs of renging rod?
Write down the name of 2 lady Bir Pratin of Bangladesh
whats the allowed tolerance of pipe to pipe butt joint mismatching
hallo I am looking for technical theortical knowledeg in air flow inside pipe and tunel's such as resisten of surefa's calculation and sempal's of calculation hopethat some budy can halp my thank you from devas
What are the uses of time standards?
How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.