Ascientist wants to speed up a chemical reaction. what are three things that he or she can do to increase the reaction rate? decrease temperature remove a catalyst increase temperature decrease concentration increase concentration add a catalyst

Chemical reaction takes place when reactants molecules collide with each other in the reacting atmosphere.  Thus, rate of a chemical reaction depends on the collision of reactant molecules and further collision depends upon various factors.

Catalyst is a substance that can change the rate of the reaction, it doesn't consumed in the reaction doesn't change the products of the chemical reaction. A catalyst increases the rate of a chemical reaction.

Increase in temperature, increases the rate of a chemical reaction as temperature is directly proportional to the rate of a chemical reaction.

Concentration of reactants also play a vital role in the rate of a chemical reaction. As the concentration of reactant increases, more will be the collisions, which increases the rate of a chemical reaction.

Thus, three things which increases the reaction rate are Addition of Catalyst, Increase Concentration and Increase Temperature.

Chemical reaction takes place when reactants molecules collide with each other in the reacting atmosphere.  Thus, rate of a chemical reaction depends on the collision of reactant molecules and further collision depends upon various factors.

Catalyst is a substance that can change the rate of the reaction, it doesn't consumed in the reaction doesn't change the products of the chemical reaction. A catalyst increases the rate of a chemical reaction.

Increase in temperature, increases the rate of a chemical reaction as temperature is directly proportional to the rate of a chemical reaction.

Concentration of reactants also play a vital role in the rate of a chemical reaction. As the concentration of reactant increases, more will be the collisions, which increases the rate of a chemical reaction.

Thus, three things which increases the reaction rate are Addition of Catalyst, Increase Concentration and Increase Temperature.

the correct answer would be d. hope this !

um i think it might be a car?