Molecular Weight of Polymers

Q.

How can we calculate the average molecular mass?

Q. 1. The volume strength of 3% solution (w/v) of H2O2 is

Q.

The average atomic mass of ${Cl}^{35}$ & ${Cl}^{37}$ is 35.5. Then % abudance ${Cl}^{35}$ of is

1. 25%

2. 75%

3. 80%

4. 20%

Q. In a polymer sample 30% of molecules have a molecular mass of 20, 000, 40% have 30, 000 and the rest 60, 000. What is the weight average molecular mass of the polymer?(1) 40, 300 (2) 30, 600 (3) 43, 333 (4) 50, 400.

Q.

Number average molecular mass and weight average molecular mass of synthetic polymers are related as?

1. $M_w>1/2M_n$

2. $M_w=M_n$

3. $M_w>M_n$

4. $M_w<M_n$

Q. the number of watermolecule in adrop of waterweighing 0.018

Q. the volume strength of 10%(w/v) H²O² solution i