Answer to Question #205746 in General Chemistry for Jerry

Question

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?

Answer 1

Teflon:

)

a)portion of long chain is:

b)

molar mass of one CF₂ unit is 50 gm

then,

mass of  5.0 x 10⁴ CF₂ units will be

=(5.0 x 10⁴ )x(50)

=25 x 10⁵ g

c)

mass % of C is

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

mass % of F is:

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