Question

10. What happens on the molecular level when you increase the reactants' surface area? (1 point)

the reactant particles' speed increases so there are more collisions and increase force

having the reactant in smaller pieces means there are more surfaces for the reaction to take place

more surface area means there are fewer possible collisions between reactants

the hotter the system is, the better the molecules can hold their orientation

Answer 1

"Having the reactant in smaller pieces means there are more surfaces for the reaction to take place."

Explanation: increasing surface area exposes more reactant particles to collisions, so collision frequency increases and the reaction rate goes up.