Question

select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Explanation:

Increasing the concentration of reactants (like adding more oxygen), and increasing the surface - area of reactants (changing from solid to powder) increases the reaction rate. Decreasing contact area, removing heat, and lowering exposure to air decrease the rate.

Answer:

• B. adding more oxygen to the reaction
• D. changing the reactants from solid form to powdered form