is my mac compatible with mountain lion?

Don't post your serial number online... that's not a good idea, and doesn't really help anyway.

The list of machines that will support Mountain Lion can be found here:

http://support.apple.com/kb/HT5444

If you aren't sure which machine you have, go to About This Mac in the Apple menu, then click the More Info button.

Computer compatibility:

http://support.apple.com/kb/HT5444

http://applehelpwriter.com/2012/08/03/will-mountain-lion-work-on-my-old-mac/

Model Number:

http://www.mactracker.ca/index.html

http://support.apple.com/kb/HT1635 (Macbook model numbers)

Applicationc Compatability. Power PC applications are not supported. You can partition your hard drive so you can run PC applications:

http://roaringapps.com/apps:table