Fluoro carbon polymers can be made by fluorinationg polythene.
(i) `(CH_(2))_(n) + 4n Co F_(3) rarr (CF_(2))_(n) + 2 nHF + 4 nCoF_(2)`
Where `n` is large integer. The `CoF_(3)` can be regenarted by the above reaction.
(ii) `2CoF_(2) + F_(2) rarr 2CoF_(3)`
If the `HF` formed in reactionn (i) cannot be reused, calculate the weight of `F_(2)` consumed by `1.0 g` of `(CF_(2))_(n)` produced.

Options

A. `2.0 g`
B. `2.52 g`
C. `1.52 g`
D. `3.0 g`

Answer

C

Explanation

`1.0 g (CF_(2))_(n) = ((cancel(1 "mol" (CF_(2))_(n)))/(50 cancel(n) g (CF_(2))_(n)) ((4 cancel(n) cancel("mol" CoF_(3)))/(cancel("mol"(CF_(2))_(n))))`
`((1 "mol" F_(2))/(2 "mol" cancel(CoF_(3)))) ((38 g F_(2))/("mol" F_(2)))`
`implies 1 xx (1)/(50) xx (4)/(1) xx (1)/(2) xx (38)/(1) implies 1.52 g F_(2)`
(note for `n` cancels)