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:

Step1: Decrease contact area

Reduces reaction rate. Incorrect.

Step2: Add oxygen

Increases reactant concentration. Correct.

Step3: Remove heat

Lowers temperature. Incorrect.

Step4: Solid to powder

Increases surface area. Correct.

Step5: Lower air exposure

Reduces oxygen. Incorrect.

Answer:

adding more oxygen to the reaction, changing the reactants from solid form to powdered form