There's a question on the site about getting file information via script, well answered by regulus6633. The solution provided worked for me on a folder, but I was unable to get it to work similarly on an application file.
set aFile to (POSIX file "/Applications/Google Chrome.app") as text
tell application "Finder" to open information window of application aFile
The path is correct, insofar as I can tell, but it keeps returning the syntax error:
"Finder got an error: Can’t get application "Macintosh HD:Applications:Google Chrome.app".
(I'm a designer, not a coder, so please excuse if the answer's obvious!)