Which of the answer choices correctly defines reaction rate?

you know its not a or b because "rate" implies speed, not amount. And you know its not d because products do not decompose into anything, they're already the end goal. So the answer must be C. Reaction rate is the speed at which a chemical reaction proceeds.

thank u

The correct answer is: the speed at which reactants change to products over a given time.

The correct definition of reaction rate is: "the speed at which reactants change to products over a given time."

To understand why, let's break down the answer choices:

Option 1: "the amount of reactants used in a specific type of reaction" - This definition refers to the amount of reactants consumed, rather than the speed of the reaction.

Option 2: "the amount of products produced in a specific type of reaction" - This definition refers to the amount of products formed, not the speed at which the reaction occurs.

Option 3: "the speed at which reactants change to products over a given time" - This is the correct definition. It focuses on how quickly reactants are converted into products during a reaction.

Option 4: "the speed at which products decompose into reactants over a given time" - This option refers to the reverse process, where products convert back into reactants. However, the reaction rate is typically associated with the forward conversion of reactants into products.

Therefore, option 3, which defines reaction rate as the speed at which reactants change to products over a given time, is the correct answer.