This self-assessment page completes the Reactions & Kinetics module, and covers material from the following sessions.

- Session 22: Introduction to Kinetics (second half)
- Session 23: Reaction Rates
- Session 24: Diffusion

On this page are a simple **weekly quiz and solutions**; relevant **exam problems and solutions** from the 2009 class; **help session videos** that review selected solutions to the exam problems; and **supplemental exam problems and solutions** for further study.

### Weekly Quiz and Solutions

This short quiz is given approximately once for every three lecture sessions. You should work through the quiz problems in preparation for the exam problems.

### Exam Problems and Solutions

These exam problems are intended for you to demonstrate your personal mastery of the material, and should be done alone, closed-book, with just a calculator, the two permitted reference tables (periodic table, physical constants), and one 8 1/2" x 11" aid sheet of your own creation.

After you’ve taken the exam, watch the help session videos below for insights into how to approach some of the exam problems.

### Exam Help Session Videos

In these videos, 3.091 teaching assistants review some of the exam problems, demonstrating their approach to solutions, and noting some common mistakes made by students.

Clip 3: Final Exam, Problem 11a

### Supplemental Exam Problems and Solutions

These additional exam problems from prior years’ classes are offered for further study.