How can you know if a chemical you encounter in your daily life is hazardous or not?
 
In the movie Crick in the Holler, the chemical company is dumping the chemical MCHM (4-methylcyclohexane methanol), which can make people sick, into the drinking water in the Elk River.
 
The heroine of the movie, Dawn, is able to quickly figure out in two ways that the chemical being dumped into her drinking water in the Elk River is hazardous. Let’s see why.
 
This real-world mystery is fun for students and involves them in the process of scientific discovery in an everyday mystery. 
 
chemistry concepts:
-moles
-avogadro's number
-molarity