For a linear polymer molecule, the total chain length l depends on the bond length between chain atoms d, the total number of bonds in the molecule n, and the angle between adjacent backbone chain atoms θ, as follows: l = n d s i n (θ/2) furthermore, the average end-to-end distance for a series of polymer molecules r is equal to: r = d (n)^1/2 for a linear polytetrafluoroethylene determine: a. the number-average molecular weight for l=2000 nm; b. the number-average molecular weight for r=17 nm.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

c. is the answer

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