A5.0 - gram sample of zinc and a 50.-milliliter sample of hydrochloric acid are used in a chemical reaction. which combination of these samples has the fastest reaction rate?
1. a zinc strip and 1.0 m hcl (aq)
2. a zinc strip and 3.0 m hcl (aq)
3. zinc powder and 1.0 m hcl (aq)
4. zinc powder and 3.0 m hcl (aq)

i believe that it is a exoplanet

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.