With this PPC-program you can calculate any molecular mass you want.
Beside the calculation function it has information of all atoms of the periodic table of elements.
These pictures show the periodic table of the elements which you can use for your calculations
These pictures show the different menu options
This picture shows the screen in the information mode. If you click on an atom (for example the Hydrogen atom) the next picture shows the screen with the information.
If you want to download or registrate this program, click
on the Handango button 
If you have questions, send a E-mail to Pieter van Santen