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2:30 AM
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Q: Can the relative velocity of two colliding molecules be too large to allow reaction to occur?

MarkVonTexasIn a collision between two molecules, can the relative velocity of one with respect to the other be too large for a reaction to occur? For example, suppose that two molecules collide with (a) a perfect orientation to enable a reaction and (b) kinetic energy in excess of the activation energy, but...

 
 
3 hours later…
5:55 AM
I'm no biologist or chemist but I'm curious: If someone requested a poison (don't ask why) that suddenly kills a human (rough weight provided) some time after injection/ingestion, can you concoct such a poison while controlling the time between injection/ingestion and the time of death? Basically, how much control can one have with the time to take effect of poisons?
 
 
5 hours later…
10:56 AM
@ChocolateOverflow "How much control" - some, in the sense that switching up the chemical composition will have an effect. Not a lot, in the sense that there is no easy, scientific way to predict or calculate how fast something acts. You effectively need to do trial and error.
It doesn't need to be a poison: people study this kind of thing regularly for normal drugs, google 'pharmacokinetics' for example
 

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