Question

1. in a chemical reaction, substances known as ________ will undergo changes to yield new substances, known as products. 36) the rate of reaction will increase with an increase in temperature. true false 37) the rate of reaction will increase with a decrease in concentration. true false 38) catalysts increase the rate of a chemical reaction by what means? a) increasing the concentration of reactants b) increasing temperature c) increasing collision energy d) lowering activation energy

Explanation:

1. In a chemical reaction, reactants transform into products.
2. Higher temperature provides more kinetic - energy to reactant particles, increasing reaction rate.
3. Decreasing concentration reduces the frequency of collisions between reactant particles, decreasing reaction rate.
4. Catalysts lower the activation energy required for a reaction to occur, thus increasing the reaction rate.

Answer:

1. Reactants
2. True
3. False
4. D. Lowering activation energy