QI/ A sample of polystyrene is composed of a series of fractions of different-sized Molecules (Chains of polymer) Fraction Weight Fraction Molecular Weight 0.10 12,000 0.19 21,000 0.24 35,000 0.18 49,000 0.11 73,000 0.08 102,000 0.06 122,000 0.04 146,000 1-Calculate the number-average and weight-average molecular weights of this polymer 2- Calculate the DPw and DPn ( Atomicweight : C=12 , H=1 , 0=16 ) ABCDEFGH

Q: 4. Which of the following decreases polymer strength? a. Increasing degree of crystallinity b.…

A: (A) not the correct option because the crystallinity of the polymer increases strength, because in…

Q: Consider sodium atom that lost 10 electrons, i.e. Na10+ ion and calculate wavelength of radiation…

A: Given that sodium has lost 10 electrons to get Na+10 ion. Hence, it would have only 1 electron left…

Q: 2. Give 2 reasons why fluorine has the highest electronegativity of any element.

A: Fluorine is known for having the highest electronegativity of any element, with a value of 3.98 on…

Q: 2. Estimate the permeability of a bed of sand with spherical particles Qp = 0.3 mm and porosity of…

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Q: Figure 1b shows the chemical structure of a tetrafluroethylene molecule and Table 1b gives the…

A: Monomer = tetrafluoroethylene Molecular weight range, number fraction, and weight fraction of a…

Q: Starting with a structural fragment, draw a complete structural formula by adding all of the…

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Q: 7. Complete the table. The polymer for each example is drawn and labeled below the table. (1 A each)…

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Q: A) HF B) HCI C) HBr D) HI

A: • In this question, we have been asked to select the species with largest dipole moment.

Q: A feed solution with a solute concentration of 3 % by weight is treated by reverse  osmosis. The…

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Q: Define Aldehydes; ketones. Give the structural similarity and difference between aldehydes and…

A: The definition of aldehydes and ketones are to be mentioned along with the difference between them.

Q: 1. The following table lists molecular weight data for polystyrene. Compute (a) the number-average…

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Q: How does the separtion of liquid mixture from osmosis differ from reverse osmosis?

A: The difference between the separation of the liquid mixture with osmosis compared to reverse osmosis…

Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.