The number of chains contained in a polypropylene sample and the number of duplicates contained in these chains

the number of units is given below. The average molar mass of this sample by number and mass is find it. ( The molar mass of propylene is CH]CH=CH2 = 42 g/mol )

The NUMBER OF Chains(N.) 400 240 180 60

The number of vinified units in the chain (i) 40 200 1200 2800

the value of 400 is equivalent to the value of 40. others, in the same way, have a value of 240 a value of 200,180 a value of 1200, and 60 a value of is 2800.