what effect do concentration changes have on the reaction rate? A. The rate is affected by the concentrations multiplied by the value of the exponent. B. The rate is affected by the concentrations raised to the power of the rate constant. C. The rate is affected by the rate constant raised to the power of the concentrations. D. The rate is affected by concentrations raised to the power of an exponent.

D. The rate is affected by concentrations raised to the power of an exponent.  

Explanation:

For a general reaction A + B ⟶ products, the rate law is

This says that the rate is directly proportional to the concentrations of the reactants, each raised to the power of an exponent.

A is wrong. The concentrations are raised to the power of an exponent.

B is wrong. The rate constant is not an exponent.

C is wrong. The rate constant is not raised to the power of an exponent.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

i think it's c. i'm not sure but i think so.