16. a reactant concentration is increased. there are:\na. more collisions and greater collision energy\nb…

16. a reactant concentration is increased. there are:\na. more collisions and greater collision energy\nb. more collisions but the same collision energy\nc. the same number of collisions and greater collision energy\nd. the same number of collisions but the same collision energy

16. a reactant concentration is increased. there are:\na. more collisions and greater collision energy\nb. more collisions but the same collision energy\nc. the same number of collisions and greater collision energy\nd. the same number of collisions but the same collision energy

Answer

Explanation:

Step1: Understand collision - theory basics

In chemical reactions, collision theory states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Step2: Analyze effect of concentration on collisions

When the reactant concentration is increased, there are more reactant particles in the same volume. So, the frequency of collisions between reactant particles increases.

Step3: Analyze effect of concentration on collision energy

The collision energy depends on the temperature of the system. Increasing the concentration does not change the kinetic - energy distribution of the particles, so the average collision energy remains the same.

Answer:

b. more collisions but the same collision energy