# Strange Chemical Formula

1. Dec 31, 2003

### Nim

I don't get this:

"Its empirical formula is
C 10 H 17 N 3 S • 2 HCl • H 2 O"

What is with those dots? And the middle part has a number before a letter...

2. Dec 31, 2003

### Monique

Staff Emeritus
Well, it means you have got a mixture of molecules.

$C_{10}H_{17}N_3S$ with two molecules of $HCl$ and a single molecule of $H_2O$