update:
i tried to solve it on my own, can someone check?
the teacher said our k from last week was wrong, and to use LnR instead.
so my ANSWER:
(-11.
-(9.75)
_____________________________
(3.50 X 10^-3)-(3.28 X 10^-3)
= -2.05/0.22 X 10^-3
= -9.32 X 10^3
2. also ANSWER for Ea:
9.32 x 10^3 x gas constant 8.3144125 j/mole
= 77.5 x 10^3 j/mole
=77.5 kj/mol