When a cube of manganese oxide was added to a solution of hydrogen peroxide, water and oxygen were produced. Manganese oxide was not used up in the reaction. Which of the following is likely to decrease the rate of the reaction?
Using a larger amount of solution
O Increasing the mass of the cube
O Chilling the hydrogen peroxide solution
O Smashing the cube into pieces

Smashing!

Explanation:

chilling the hydrogen peroxide solution

This will Decrease the rate of reaction

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

the answer would be a