The rate constant for the following equation

is 0.00454 M−1
· s
−1
. We start with 0.134 mol
C2F4 in a 4 liter container, with no C4F8
initially present.
2 C2F4 → C4F8
What will be the concentration of C2F4
after 2 hours?
Answer in units of M.

(1/[A]) - (1/[Ao]) = akt

You know a, k, and can calculate (Ao).
Solve for A.