Question #205746

Consider Teflon, the polymer made from tetrafluoroethylene.

a) Draw a portion of the Teflon molecule.

b) Calculate the molar mass of a Teflon molecule that contains 5.0 x 104 CF2 units.

c) What are the mass percents of C and F in Teflon?

Expert's answer

Teflon:

)

a)portion of long chain is:

b)

molar mass of one CF_{2} unit is 50 gm

then,

mass of 5.0 x 10^{4} CF_{2} units will be

=(5.0 x 10^{4 })x(50)

=25 x 10^{5 }g

c)

mass % of C is

="{12\\over 50}\\times100=24%" %

mass % of F is:

= "{38\\over 50}\\times100=76%" %

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