If you are talking about FRS radios, the answer would be yes. If you are talking about business radios, it depends on how they were programmed. Business radios have many frequencies available.
Not all Motorola FRS radio models use the same designations for a give frequency or tone. You may have trouble talking with models different from your own...
I think you'll think this is fantastic: http://www.giantintl.com/ContentManage/manuals/Moto/T8500%20English%20only%20June5.pdf