Can I weigh luggage; before the date I travel to ensure luggage is not over 50 lbs at Norfolk International Airport?

Sure...but remember you are always subject to their scales so I would pack slightly lighter to ensure you don't have any issues

Yes you are able to but make sure that is right because the ticket scales are very accurate.

Yes

Yes you can . Ticket counter scales are calibrated quarterly. It is pretty accurate.

Yes u can at counter