The temperature dependence of the rate constant for a reaction is tabulated as follows. temperature (k) k (m−1s−1) 600. 0.028 650. 0.22 700. 1.3 750. 6.0 800. 23 calculate ea and a.

See attached photos for the solution:

 k is the rate constant

 T is the absolute temperature (in kelvins)

 A is the pre-exponential factor, a constant for each chemical reaction. According to collision theory, A is the frequency of collisions in the correct orientation

 Ea is the activation energy for the reaction (in the same units as R*T)

 R is the universal gas constant.

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.