Molecular Weight

Chemical drawing software and molecular weight calculation

Most chemical structure drawing packages allow you to calculate molecular weight, also known as molecular mass, for any structure you draw. In no particular order:

Of course, if you have the mol file or an equivalent you should be able to open any structure with an appropriate viewer, including something like good-old Chime (from MDL) or the open source JMol or any of a dozen other viewers. If you want to create beautiful 3D images then Crystal coupled with Rasmol might be the way to go.

For more chemistry software, including a plethora of molecular weight and other calculators check out the Umea website