Te
hoa
lieckd
check all the characteristics below that describe
elements.
o one type of atom
a pure substance
more than one type of atom
10 chemically combined elements
cha

the real answer is b. scintillation counter

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.