Question

A polymer consists of $ 8 $ atoms of sulphur per molecule which is $ 2% $ by mass. The molar mass of the polymer is:

Answer 1

Hint :We know that it's already known that polymers are the large molecules formed from the small repeating units. The repeating units are called monomers. The process of formation of polymers from monomer units is called polymerization. Polymers of different masses and different properties are formed. Natural rubber is a polymer with the chemical name polyisoprene.

Complete Step By Step Answer:
We know that condensation polymerization is also known as step growth polymerization; it emits small molecules as a byproduct of polymerization reaction. Additional polymerization is also known as chain-growth polymerization; the monomer units combine without formation of any kind of byproducts with the help of reaction initiators. Vulcanization is the process of introducing sulfur atoms cross links between the polymeric chains. It is known to improve the thermo-stability and elasticity of natural rubber. The stiffness of vulcanized rubber depends on the quantity of added sulphur. Higher tensile strength, increasing of elastic strength to a greater range of temperature, resistance to swelling, and abrasion are the improved properties obtained after vulcanization.
The compound has sulphur $ \,=8% $ . Thus, the $ 8 $ grams of Sulphur is present in $ 100 $ gram [The least molecular mass means that at least one atom of sulphur should be present in a molecule]
Therefore, $ 32 $ gram of Sulphur is present in $ \dfrac{100}{8}\times 32=400\text{ }gram. $

Additional Information:
Vulcanization is a compound procedure that changes over common elastic and other poldine elastomers into cross connected polymers. The most widely recognized vulcanization operator is sulfur. Its structure spans between singular polymer atoms when warmed with elastic. Frequently an impetus and initiator are added to quicken the vulcanization procedure. The cross-connected elastomers have significantly better mechanical properties. The unvulgarized elastic has poor mechanical properties and isn't truly tough.

Note :
Remember that the mineral sulfur is generally utilized for fixing the shape of cross-joins between the elastic chains in the vulcanization procedure. During intensification, a highly versatile state of sulfur at temperatures somewhere in the range of $ 40{}^\circ C $ and $ 70{}^\circ C $ stretches off its particles and then breaks off these flimsy and powerless needles into pieces.