The next chapter to be released of my new book is now available from the iBookstore. Learn Advanced Chemistry: Spectrophotometry, a great introduction to spectrophotometry.

Also available are the iBooks on Chemical Kinetics, Mass Spectrometry, and Liquid Chromatography. Use the iBookstore link below:

Many students are looking for more question to practice to prepare for the AP Test as well as the ACT science test. I have been working with a online review site to generate questions for the ACT Science test you can get more information here:

The problem for today, Thursday, April 27, 2017 is:


Get daily Practice Problems from by email!

How it works:

  1. Sign up with your email address:
    Your email address will not be shared.
  2. Get a new AP-style problem delivered to your email inbox each weekday
  3. Click the link in the email to see the correct answer with explanation.