Question

Молекулярная масса полиэтилена 560 000. Вычислить среднее число звеньев в цепочке его полимера.

Answer 1

Нужно разделить на массу мтрукткрного звена полиетилена- (С2Н4)28 = 12-2+1-4=28 
560000/28=20000 

Answer 2

Calculation of Average Number of Links in a Polymer Chain

To calculate the average number of links in a polymer chain, we can use the concept of the degree of polymerization. The degree of polymerization (DP) is defined as the average number of monomer units in a polymer chain.

In this case, we are given the molecular mass of polyethylene, which is 560,000. The molecular mass of polyethylene is the sum of the masses of all the monomer units in the polymer chain.

To calculate the average number of links in a polymer chain, we can use the following formula:

Average Number of Links = Molecular Mass of Polymer / Molecular Mass of a Single Link

In this case, the molecular mass of a single link is not provided. However, we can assume that the molecular mass of a single ethylene monomer unit is approximately 28 g/mol. This is based on the fact that the molecular mass of ethylene (C2H4) is approximately 28 g/mol.

Using this assumption, we can calculate the average number of links in the polyethylene polymer chain as follows:

Average Number of Links = 560,000 / 28

Calculating this, we find:

Average Number of Links = 20,000

Therefore, the average number of links in the polyethylene polymer chain is 20,000.

Please note that the assumption made about the molecular mass of a single ethylene monomer unit may not be accurate. It is always best to consult reliable sources or experimental data for precise values of molecular masses when performing calculations.