What is the process by which pure metal (like Cu or Fe) is removed from a metal ore like chalcopyrite (CuFeS2)

the answer is alpha particles hope i you

hi my dude or dudette

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

the correct answer would be b) volume versus temperature, because they are also directly proportional.